Anatomy: Lower Limb
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Questions and Answers

What is the primary function of the lower limbs?

  • To maintain balance and posture
  • To facilitate movement of the upper limb
  • To regulate blood pressure and circulation
  • To support the weight of the body and produce locomotion (correct)

    • What is the term for the joint that connects the two hip bones anteriorly?

  • Pelvis
  • Coccyx
  • Sacrum
  • Symphysis pubis (correct)

    • Which of the following bones is NOT part of the lower limb?

  • Fibula
  • Scapula (correct)
  • Os coxae
  • Tibia

    • What is the term for the arches of the foot that are oriented longitudinally?

    <p>Medial and lateral longitudinal arches</p> Signup and view all the answers

    What is the purpose of the gluteal region in the lower limb?

    <p>To provide stability for the pelvis</p> Signup and view all the answers

    What is the term for the joint that connects the hip bones posteriorly with the trunk?

    <p>Sacrolliac joint</p> Signup and view all the answers

    What is the purpose of the tarsal bones in the lower limb?

    <p>To provide a foundation for the metatarsal bones</p> Signup and view all the answers

    What is the general arrangement of the bones in the lower limb compared to the upper limb?

    <p>Very similar</p> Signup and view all the answers

    What is the function of the lower limb girdle?

    <p>To attach the limb to the vertebral column</p> Signup and view all the answers

    Which of the following bones is not part of the os coxae?

    <p>Clavicle</p> Signup and view all the answers

    What is the name of the surface where the three bones of the os coxae fuse?

    <p>Triradiate cartilage</p> Signup and view all the answers

    Which muscle is located near the inguinal ligament?

    <p>Sartorius</p> Signup and view all the answers

    What is the point of attachment for the rectus femoris muscle?

    <p>Anterior inferior iliac spine</p> Signup and view all the answers

    What is the topographical and functional equivalent of the os coxae in the upper limb?

    <p>Clavicle and scapula</p> Signup and view all the answers

    What is the function of the gluteus minimus muscle?

    <p>To abduct the hip joint</p> Signup and view all the answers

    Which of the following muscles is not a part of the gluteal muscles?

    <p>Tensor fasciae latae</p> Signup and view all the answers

    What is the name of the bony structure that forms the lower limb girdle?

    <p>Os coxae</p> Signup and view all the answers

    What is the landmarks of the tensor fasciae latae muscle?

    <p>Anterior superior iliac spine and inguinal ligament</p> Signup and view all the answers

    How many skeletal elements form the os coxae?

    <p>Three</p> Signup and view all the answers

    What is the purpose of the compartmentalization of the thigh and leg?

    <p>To allow for distinct nerve and blood supply</p> Signup and view all the answers

    What is the anatomical structure that separates the femoral artery from the saphenous opening?

    <p>Deep fascia</p> Signup and view all the answers

    Where is the membranous layer of superficial fascia attached?

    <p>About a fingerbreadth below the inguinal ligament</p> Signup and view all the answers

    What is the name of the group of lymph nodes located horizontally near the inguinal ligament?

    <p>Horizontal group of superficial inguinal lymph nodes</p> Signup and view all the answers

    What is the name of the structure that surrounds the femoral artery?

    <p>Femoral sheath</p> Signup and view all the answers

    Which structure is located near the saphenous opening?

    <p>Femoral artery</p> Signup and view all the answers

    What is the path of the sciatic nerve in the gluteal region?

    <p>It passes through the greater sciatic foramen above the piriformis muscle</p> Signup and view all the answers

    What is the main supply of the trochanteric anastomosis?

    <p>The head of the femur</p> Signup and view all the answers

    Which nerve distributes branches throughout the gluteal region?

    <p>Posterior cutaneous nerve of the thigh</p> Signup and view all the answers

    Where does the superior gluteal nerve leave the pelvis?

    <p>Through the upper part of the greater sciatic foramen above the piriformis</p> Signup and view all the answers

    What is the origin of the posterior cutaneous nerve of the thigh?

    <p>Sciatic nerve</p> Signup and view all the answers

    What is the main branch of the tibial nerve in the lower limb?

    <p>Cutaneous branch to the back of the thigh and the leg</p> Signup and view all the answers

    Which muscle is supplied by the posterior cutaneous nerve of the thigh?

    <p>None of the above</p> Signup and view all the answers

    Which artery ends by supplying the tensor fasciae latae?

    <p>Medial femoral circumflex artery</p> Signup and view all the answers

    What is the main function of the trochanteric anastomosis?

    <p>Providing blood supply to the head of the femur</p> Signup and view all the answers

    Through which foramen do the Inferior gluteal nerve and Nerve to Quadratus Femoris leave the pelvis?

    <p>Greater sciatic foramen</p> Signup and view all the answers

    What is the name of the anastomosis situated at the level of the lesser trochanter of the femur?

    <p>Cruciate anastomosis</p> Signup and view all the answers

    What receives lymph from the lower half of the anal canal?

    <p>Umbilicus</p> Signup and view all the answers

    Which muscle is supplied by the Inferior gluteal Nerve?

    <p>Gluteus maximus</p> Signup and view all the answers

    What is the function of the anastomosis formed by the inferior gluteal artery, medial femoral circumflex artery, and lateral femoral circumflex artery?

    <p>To provide a collateral connection between the internal iliac and femoral arteries</p> Signup and view all the answers

    What is the route by which all lymph from the superficial and deep inguinal lymph nodes ultimately drains?

    <p>Femoral canal</p> Signup and view all the answers

    Which nerves leave the pelvis through the lower part of the greater sciatic foramen?

    <p>Inferior gluteal nerve and Nerve to Quadratus Femoris</p> Signup and view all the answers

    What forms the greater sciatic foramen?

    <p>Sacrotuberous and sacrospinous ligaments</p> Signup and view all the answers

    What is located near the saphenous opening in the deep fascia?

    <p>Superficial inguinal lymph nodes</p> Signup and view all the answers

    What is the name of the proximal segment of the lower limb?

    <p>Thigh</p> Signup and view all the answers

    What is the bony core of the thigh?

    <p>Femur</p> Signup and view all the answers

    What is the anatomical region that includes the umbilicus?

    <p>Abdominal walls</p> Signup and view all the answers

    What is the relationship between the superficial and deep inguinal lymph nodes?

    <p>They are anatomically separate but functionally connected</p> Signup and view all the answers

    What is the term for the foramen formed by the greater sciatic notch of the hip bone and the sacrotuberous and sacrospinous ligaments?

    <p>Greater sciatic foramen</p> Signup and view all the answers

    What receives lymph from the abdominal walls below the level of the umbilicus?

    <p>Superficial inguinal lymph nodes</p> Signup and view all the answers

    What is the function of the perforating veins in preventing high-pressure venous blood from flowing outward into superficial veins?

    <p>They prevent high-pressure venous blood from being forced outward into superficial veins</p> Signup and view all the answers

    What is the result of the muscles within the closed fascial compartments relaxing?

    <p>Venous blood is sucked from the superficial into the deep veins</p> Signup and view all the answers

    What is the characteristic of a varicosed vein?

    <p>It has a larger diameter than normal and is elongated and tortuous</p> Signup and view all the answers

    What is the nerve that supplies the skin immediately in front of the medial malleolus of the tibia?

    <p>Saphenous nerve</p> Signup and view all the answers

    What is the purpose of blocking the saphenous nerve branches with local anesthetic?

    <p>To prevent considerable discomfort and pain</p> Signup and view all the answers

    What is the location of the transverse incision made through the skin and subcutaneous tissue?

    <p>Across the long axis of the vein, anterior and superior to the medial malleolus</p> Signup and view all the answers

    What is the consequence of incompetent valves in the veins?

    <p>Varicosed veins</p> Signup and view all the answers

    What is the common site for varicose veins?

    <p>The superficial veins of the lower limb</p> Signup and view all the answers

    What is the location of the great saphenous vein in relation to the pubic tubercle?

    <p>Below and lateral to</p> Signup and view all the answers

    Which nerve lies just anterior to the great saphenous vein?

    <p>Saphenous nerve</p> Signup and view all the answers

    What is the purpose of reversing the great saphenous vein in coronary bypass surgery?

    <p>To prevent obstruction of arterial flow by valves</p> Signup and view all the answers

    What is the location of the incision made for the great saphenous vein cutdown?

    <p>Below and lateral to the pubic tubercle</p> Signup and view all the answers

    What is the significance of the saphenous opening in the femoral vein?

    <p>It is the site of entrance of the great saphenous vein into the femoral vein</p> Signup and view all the answers

    What is the purpose of blocking the branches of the ilioinguinal nerve and the intermediate cutaneous nerve of the thigh?

    <p>To block sensation in the thigh and labium majus</p> Signup and view all the answers

    What is the anatomical structure that separates the femoral artery from the saphenous opening?

    <p>Deep fascia</p> Signup and view all the answers

    What is the name of the nerve that supplies the area of skin below and lateral to the scrotum or labium majus?

    <p>Intermediate cutaneous nerve of the thigh</p> Signup and view all the answers

    Which artery is located near the femoral canal?

    <p>Profunda femoris artery</p> Signup and view all the answers

    What is the name of the bony structure that forms the lower limb girdle in the right lower limb?

    <p>Os coxae</p> Signup and view all the answers

    Which muscle is located near the pubic tubercle?

    <p>Adductor magnus</p> Signup and view all the answers

    What is the name of the canal that contains the femoral artery and vein?

    <p>Femoral sheath</p> Signup and view all the answers

    Which structure is located near the inguinal ligament?

    <p>Femoral triangle</p> Signup and view all the answers

    What is the name of the artery that supplies the tensor fasciae latae muscle?

    <p>Lateral femoral circumflex artery</p> Signup and view all the answers

    What is the primary function of the perforating veins in the lower limb?

    <p>To prevent high-pressure venous blood from flowing outward into superficial veins</p> Signup and view all the answers

    What is the route by which lymph from the superficial and deep inguinal lymph nodes ultimately drains?

    <p>Into the thoracic duct</p> Signup and view all the answers

    Which of the following structures is not located near the inguinal ligament?

    <p>Tensor fasciae latae muscle</p> Signup and view all the answers

    What is the main function of the great saphenous vein?

    <p>To allow superficial venous blood to ascend the lower limb</p> Signup and view all the answers

    What receives lymph from the skin and superficial fascia of the anterior and posterior abdominal walls?

    <p>Inguinal lymph nodes</p> Signup and view all the answers

    What is the anatomical structure that separates the femoral artery from the saphenous opening?

    <p>Inguinal ligament</p> Signup and view all the answers

    Which of the following structures is not a part of the superficial inguinal lymph nodes?

    <p>Tensor fasciae latae muscle</p> Signup and view all the answers

    What is the relationship between the superficial and deep inguinal lymph nodes?

    <p>They are interconnected and drain the same areas</p> Signup and view all the answers

    What is the common location of the deep inguinal lymph nodes?

    <p>Along the medial side of the terminal part of the femoral vein</p> Signup and view all the answers

    What is the main action of the quadriceps femoris muscle?

    <p>Extension of the knee joint</p> Signup and view all the answers

    Which muscles form the iliopsoas muscle in the thigh?

    <p>Iliacus and psoas major</p> Signup and view all the answers

    What is the path of the efferent lymph vessels from the deep inguinal lymph nodes?

    <p>They flow into the external iliac nodes and then drain into the abdominal cavity</p> Signup and view all the answers

    What is the function of the retinacula formed by the tendinous fibers of the vastus lateralis and vastus medialis?

    <p>They strengthen the knee joint</p> Signup and view all the answers

    What is the origin of the lymph that drains into the deep inguinal lymph nodes?

    <p>From both the superficial inguinal nodes and deep structures of the lower limb</p> Signup and view all the answers

    What is the insertion point of the quadriceps femoris muscle?

    <p>Tibial tuberosity</p> Signup and view all the answers

    What is the location of the deep inguinal lymph nodes in relation to the femoral vein?

    <p>Medial to the femoral vein</p> Signup and view all the answers

    What is the relationship between the obturator nerve and the adductor muscles in the right lower limb?

    <p>The obturator nerve is anterior to the adductor muscles in the right lower limb.</p> Signup and view all the answers

    What is the function of the sartorius muscle?

    <p>Flexes, abducts, and laterally rotates the thigh at the hip joint.</p> Signup and view all the answers

    What is the point of attachment of the iliacus muscle?

    <p>Iliopubic eminence</p> Signup and view all the answers

    Which nerve supplies the sartorius muscle?

    <p>Femoral nerve</p> Signup and view all the answers

    What is the relationship between the profunda femoris artery and the adductor magnus muscle?

    <p>The profunda femoris artery is anterior to the adductor magnus muscle.</p> Signup and view all the answers

    What is the segment of the lower limb that includes the thigh?

    <p>Proximal segment of the lower limb</p> Signup and view all the answers

    Which nerve descends in the midline of the posterior compartment of the thigh?

    <p>Sciatic nerve</p> Signup and view all the answers

    Which muscle is located near the inguinal ligament?

    <p>Tensor fasciae latae</p> Signup and view all the answers

    What is the name of the vein that drains the greater part of the blood from the compartment?

    <p>Profunda femoris vein</p> Signup and view all the answers

    Which bone forms the bony core of the thigh?

    <p>Femur</p> Signup and view all the answers

    Which nerve supplies the gluteus maximus muscle?

    <p>Inferior gluteal nerve</p> Signup and view all the answers

    What is the name of the artery that ends by supplying the tensor fasciae latae muscle?

    <p>Medial femoral circumflex artery</p> Signup and view all the answers

    Which structure is located near the saphenous opening?

    <p>Membranous layer of superficial fascia</p> Signup and view all the answers

    What is the name of the anastomosis situated at the level of the lesser trochanter of the femur?

    <p>Trochanteric anastomosis</p> Signup and view all the answers

    Which muscle does the tibial nerve supply in the posterior compartment of the thigh?

    <p>Most of the muscles in the posterior compartment</p> Signup and view all the answers

    At what level does the sciatic nerve occasionally divide into its two terminal parts?

    <p>All of the above</p> Signup and view all the answers

    Which nerve innervates the short head of the biceps?

    <p>Common fibular nerve</p> Signup and view all the answers

    What is the relationship between the two terminal parts of the sciatic nerve?

    <p>They are separate and distinct nerves</p> Signup and view all the answers

    What is the location of the tibial nerve and the common fibular nerve in the lower limb?

    <p>In the popliteal fossa</p> Signup and view all the answers

    What muscles overlap the sciatic nerve posteriorly?

    <p>Semimembranosus and biceps femoris</p> Signup and view all the answers

    What is the relation of the popliteal surface of the femur with the knee joint?

    <p>Posterior</p> Signup and view all the answers

    Which structures are located posterior to the popliteal artery?

    <p>Popliteal vein, tibial nerve, and fascia</p> Signup and view all the answers

    What is the cause of popliteal aneurysms?

    <p>Pulsations of the femoral artery against the tendon of the adductor magnus</p> Signup and view all the answers

    What is the characteristic of a semimembranosus bursa swelling?

    <p>It becomes smaller when the knee joint is flexed</p> Signup and view all the answers

    What is the purpose of the anastomosis of small branches of the femoral artery?

    <p>To compensate for the narrowing of the popliteal artery during extreme flexion of the knee</p> Signup and view all the answers

    What is the characteristic of the popliteal artery?

    <p>It is narrowed during extreme flexion of the knee</p> Signup and view all the answers

    What is the significance of the profuse anastomosis of small branches of the femoral artery?

    <p>It compensates for the narrowing of the popliteal artery during extreme flexion of the knee</p> Signup and view all the answers

    What is the difference between a semimembranosus bursa swelling and a Baker's cyst?

    <p>A semimembranosus bursa swelling is tense when the knee joint is extended, while a Baker's cyst is not</p> Signup and view all the answers

    Which ligament contributes to the popliteus fascia?

    <p>Oblique popliteal ligament</p> Signup and view all the answers

    What is the name of the artery that branches into the sural artery and the lateral calcaneal artery?

    <p>Fibular artery</p> Signup and view all the answers

    Which muscle is located near the tibial nerve?

    <p>Gastrocnemius</p> Signup and view all the answers

    What is the name of the structure that separates the tibia and fibula?

    <p>Interosseous membrane</p> Signup and view all the answers

    Which nerve is a branch of the common fibular nerve?

    <p>Superficial fibular nerve</p> Signup and view all the answers

    What is the name of the muscle that is located near the saphenous opening?

    <p>Tensor fasciae latae</p> Signup and view all the answers

    Which artery is a branch of the popliteal artery?

    <p>Sural artery</p> Signup and view all the answers

    What is the name of the ligament that connects the tibia and fibula?

    <p>Tibiofibular ligament</p> Signup and view all the answers

    What is the name of the fibrous expansion that reinforces the capsule on the back of the knee joint?

    <p>Oblique popliteal ligament</p> Signup and view all the answers

    Which nerve supplies the short head of the biceps femoris muscle?

    <p>Common fibular nerve</p> Signup and view all the answers

    What is the name of the muscle that has two parts, an upper adductor part and a lower hamstring part, and receives a dual innervation from the tibial nerve and obturator nerve?

    <p>Adductor magnus</p> Signup and view all the answers

    Which artery gives rise to the four perforating branches that supply the posterior compartment of the thigh?

    <p>Profunda femoris artery</p> Signup and view all the answers

    What is the name of the ligament that sends a fibrous expansion upward and laterally, which reinforces the capsule on the back of the knee joint?

    <p>Oblique popliteal ligament</p> Signup and view all the answers

    Which muscle has two heads, a long head (hamstring portion) and a short head (gluteal portion), and receives a dual nerve supply from the sciatic nerve?

    <p>Biceps femoris</p> Signup and view all the answers

    What is the name of the nerve that supplies the long head of the biceps femoris muscle?

    <p>Tibial nerve</p> Signup and view all the answers

    What is the term for the muscles of the posterior fascial compartment of the thigh?

    <p>Hamstrings</p> Signup and view all the answers

    What is the function of the synovial sheath surrounding the tendons that pass beneath the flexor retinaculum?

    <p>To reduce friction</p> Signup and view all the answers

    Which of the following structures is NOT located near the medial malleolus of the tibia?

    <p>Lateral malleolus</p> Signup and view all the answers

    What is the term for the top of the foot?

    <p>Donum</p> Signup and view all the answers

    Which of the following tendons passes behind the medial malleolus?

    <p>Tibialis posterior tendon</p> Signup and view all the answers

    What is the function of the arches of the foot?

    <p>To distribute body weight</p> Signup and view all the answers

    Which of the following structures is responsible for supplying the skin over the medial surface of the heel?

    <p>Medial calcaneal branch</p> Signup and view all the answers

    What is the term for the joint that connects the tibia and fibula?

    <p>Tibiofibular joint</p> Signup and view all the answers

    Which of the following muscles has a tendon that passes behind the medial malleolus?

    <p>Tibialis posterior</p> Signup and view all the answers

    Which structure pierces the interosseous membrane to reach the lower part of the front of the leg?

    <p>Perforating branch</p> Signup and view all the answers

    What type of embolism is often fatal if the thrombus becomes dislodged?

    <p>Pulmonary embolism</p> Signup and view all the answers

    Which artery forms the popliteal vein in the popliteal fossa?

    <p>Posterior tibial artery</p> Signup and view all the answers

    What is the primary action of the tibialis posterior muscle?

    <p>Inverts the foot at the subtalar and transverse tarsal joints</p> Signup and view all the answers

    What is the purpose of stretching the legs every hour?

    <p>To improve the venous circulation</p> Signup and view all the answers

    Which nerve is located on the front of the medial malleolus?

    <p>Saphenous nerve</p> Signup and view all the answers

    What is the location of the tibialis posterior muscle in the lower leg?

    <p>On the posterior surface of the tibia</p> Signup and view all the answers

    What is the anatomical structure that connects the medial and lateral plantar arteries to the sole of the foot?

    <p>Flexor retinacula</p> Signup and view all the answers

    What is the relationship between the popliteus muscle and the lateral meniscus of the knee joint?

    <p>The popliteus muscle separates the lateral meniscus from the lateral ligament of the knee joint</p> Signup and view all the answers

    What is the action of the popliteus muscle on the knee joint?

    <p>Unlocks the knee joint</p> Signup and view all the answers

    Which artery is responsible for supplying the tibia?

    <p>Nutrient artery</p> Signup and view all the answers

    What is the relationship between the venae comitantes of the posterior tibial artery and the anterior tibial artery?

    <p>They join in the popliteal fossa</p> Signup and view all the answers

    What is the course of the posterior tibial artery in the lower leg?

    <p>It passes posterior to the medial malleolus</p> Signup and view all the answers

    What is the relationship between the posterior tibial artery and the deep transverse fascia of the leg?

    <p>The artery is covered by the fascia</p> Signup and view all the answers

    What is the nerve root supply of the tibialis posterior muscle?

    <p>L5-S1</p> Signup and view all the answers

    What is the function of the interosseous membrane between the tibia and fibula?

    <p>It connects the tibia and fibula</p> Signup and view all the answers

    Which nerve branch innervates the medial side of the heel?

    <p>Medial calcaneal branch of the tibial nerve</p> Signup and view all the answers

    What is the purpose of the fibrous bands in the skin of the sole of the foot?

    <p>To firmly bind the skin to the underlying deep fascia</p> Signup and view all the answers

    What structures lie behind the ankle?

    <p>Fat and the large tendo calcaneus</p> Signup and view all the answers

    What is the function of the foot?

    <p>To provide leverage for walking and running</p> Signup and view all the answers

    What is the term for the bottom of the foot?

    <p>Aole or plantar</p> Signup and view all the answers

    What is the location of the skin of the sole of the foot?

    <p>Thick and hairless</p> Signup and view all the answers

    What is the function of the plantar aponeurosis?

    <p>It protects the underlying nerves, blood vessels, and muscles</p> Signup and view all the answers

    What is the point of attachment of the apex of the plantar aponeurosis?

    <p>The medial and lateral tubercles of the calcaneum</p> Signup and view all the answers

    Which nerve innervates the lateral third of the sole?

    <p>Lateral plantar nerve</p> Signup and view all the answers

    What is the condition that causes pain and tenderness of the sole of the foot?

    <p>Plantar fasciitis</p> Signup and view all the answers

    What is the result of repeated attacks of plantar fasciitis?

    <p>Formation of a calcaneal spur</p> Signup and view all the answers

    How many layers are the muscles of the sole conveniently described in?

    <p>Four layers</p> Signup and view all the answers

    What is the name of the muscle that is located near the inguinal ligament?

    <p>Tensor fasciae latae</p> Signup and view all the answers

    What is the course of the medial plantar nerve?

    <p>Deep to the flexor retinaculum, behind the medial malleolus</p> Signup and view all the answers

    What is the distribution of the lateral plantar nerve?

    <p>Supply the skin of the lateral part of the sole</p> Signup and view all the answers

    What is the termination of the tibial nerve?

    <p>Into the medial and lateral plantar nerves</p> Signup and view all the answers

    What is the accompanied artery of the medial plantar vein?

    <p>Medial plantar artery</p> Signup and view all the answers

    Where does the lateral plantar nerve arise?

    <p>Deep to the flexor retinaculum</p> Signup and view all the answers

    What is the course of the plantar arch?

    <p>Deep to the plantar aponeurosis, across the sole</p> Signup and view all the answers

    What is the relationship between the medial and lateral plantar veins?

    <p>They unite behind the medial malleolus to form the posterior tibial venae comitantes</p> Signup and view all the answers

    What is the distribution of the medial plantar nerve?

    <p>Supply the skin of the medial part of the sole</p> Signup and view all the answers

    What is the characteristic of the skin on the dorsum of the foot?

    <p>Thin, hairy, and freely mobile</p> Signup and view all the answers

    How does the tendon divide on the dorsum of the foot?

    <p>Into four, which fan out over the dorsum of the foot</p> Signup and view all the answers

    What is the origin of the superficial fibular (peroneal) nerve?

    <p>Between the fibularis brevis and the extensor digitorum longus muscle</p> Signup and view all the answers

    What is the function of the extensor expansion near the proximal interphalangeal joint?

    <p>It receives the tendons of insertion of the interosseous and lumbrical muscles</p> Signup and view all the answers

    What is the nerve supply to the skin on the dorsum of the foot?

    <p>Derived from the superficial fibular (peroneal) nerve, assisted mainly by the deep fibular (peroneal), saphenous, and sural nerves</p> Signup and view all the answers

    What is the structure that joins the extensor tendon on its lateral side?

    <p>Tendon of extensor digitorum brevis</p> Signup and view all the answers

    What is the insertion of the central part of the extensor expansion?

    <p>Into the base of the middle phalanx</p> Signup and view all the answers

    What is the characteristic of the dorsum of the foot similar to?

    <p>The condition in the dorsum of the hand</p> Signup and view all the answers

    What is the name of the artery that completes the plantar arterial arch?

    <p>Lateral plantar artery</p> Signup and view all the answers

    Which nerve supplies the skin of the adjacent sides of the big and second toes?

    <p>Deep fibular nerve</p> Signup and view all the answers

    What is the name of the muscle that sends a long tendon to the big toe?

    <p>Extensor hallucis brevis</p> Signup and view all the answers

    Which structure does the tendon of extensor digitorum longus pass through?

    <p>Superior extensor retinaculum</p> Signup and view all the answers

    What is the name of the branch of the deep fibular nerve that supplies the skin of the adjacent sides of the big and second toes?

    <p>Medial branch</p> Signup and view all the answers

    Which muscle is related to the fourth dorsal interosseous muscle?

    <p>Extensor digitorum brevis</p> Signup and view all the answers

    What is the name of the artery that passes deep to the extensor retinacula on the lateral side of the dorsalis pedis artery?

    <p>Deep fibular artery</p> Signup and view all the answers

    Which nerve enters the dorsum of the foot by passing deep to the extensor retinacula on the lateral side of the dorsalis pedis artery?

    <p>Deep fibular nerve</p> Signup and view all the answers

    What is the main purpose of the synovial sheath that surrounds the extensor digitorum longus and fibularis tertius tendons?

    <p>To reduce friction between the tendons and surrounding tissues.</p> Signup and view all the answers

    Which nerve supplies the skin along the lateral margin of the foot and the lateral side of the little toe?

    <p>Sural nerve</p> Signup and view all the answers

    What is the continuation of the anterior tibial artery that supplies the dorsum of the foot?

    <p>Doral artery of the foot</p> Signup and view all the answers

    What is the relationship between the medial and lateral cutaneous branches of the deep fibular nerve?

    <p>They supply adjacent areas of the foot.</p> Signup and view all the answers

    What is the common synovial sheath that surrounds the extensor digitorum longus and fibularis tertius tendons proximal to?

    <p>The malleoli</p> Signup and view all the answers

    What is the nerve that supplies the nail beds and the skin covering the dorsal surfaces of the terminal phalanges?

    <p>Medial and lateral plantar nerves</p> Signup and view all the answers

    What is the dorsal venous arch also known as?

    <p>Dorsal venous arch (or network)</p> Signup and view all the answers

    What is the landmark where the dorsal artery of the foot begins?

    <p>Imaginary line connecting the malleoli</p> Signup and view all the answers

    What is the function of the ligament of the head of the femur?

    <p>To convert the notch into a tunnel for nerves and blood vessels</p> Signup and view all the answers

    What is the significance of the shape of the bones in the hip joint?

    <p>It increases the strength of the joint</p> Signup and view all the answers

    What is the effect of flexion of the knee on the hip joint?

    <p>It restricts the range of motion</p> Signup and view all the answers

    What is the function of the synovial membrane in the hip joint?

    <p>To line the capsule and attach to the margins of the articular surfaces</p> Signup and view all the answers

    What is the significance of the tension of the hamstring group of muscles on the hip joint?

    <p>It restricts the range of motion</p> Signup and view all the answers

    What is the attachment point of the ligament of the head of the femur?

    <p>The pit on the head of the femur and the margins of the acetabular notch</p> Signup and view all the answers

    What is the purpose of the transverse ligament in the hip joint?

    <p>To attach the ligament of the head of the femur</p> Signup and view all the answers

    What is the relationship between the hip joint and the surrounding muscles?

    <p>The muscles strengthen the joint</p> Signup and view all the answers

    What is the primary factor contributing to the stability of the knee joint?

    <p>Tone of the muscles</p> Signup and view all the answers

    Which muscle group is most important for stabilizing the knee joint?

    <p>Quadriceps femoris</p> Signup and view all the answers

    What is the result of forced abduction of the tibia on the femur?

    <p>Partial tearing of the medial collateral ligament</p> Signup and view all the answers

    What is the name of the bursa located anteriorly to the knee joint?

    <p>Prepatellar bursa</p> Signup and view all the answers

    What is the role of the physiotherapist in relation to the knee joint?

    <p>To build up the strength of the quadriceps femoris muscle</p> Signup and view all the answers

    Which muscle forms the boundary of the popliteal fossa?

    <p>Semimembranosus muscle</p> Signup and view all the answers

    What is the location of tenderness when there is a tear in the menisci?

    <p>Localized on the joint line</p> Signup and view all the answers

    What is the effect of damage to the articular surfaces, menisci, or ligaments of the joint?

    <p>The synovial cavity becomes distended with fluid</p> Signup and view all the answers

    What is the result of forced adduction of the tibia on the femur?

    <p>Injury to the lateral collateral ligament</p> Signup and view all the answers

    Which ligament is the most frequently injured in the body?

    <p>Anterior cruciate ligament</p> Signup and view all the answers

    What is the result of injury to the cruciate ligaments?

    <p>The knee joint becomes less stable</p> Signup and view all the answers

    What is the extent of swelling in the knee joint when the synovial membrane is distended with fluid?

    <p>Three or four fingerbreadths above the patella</p> Signup and view all the answers

    What is the relationship between the suprapatellar bursa and the joint cavity?

    <p>The suprapatellar bursa communicates with the joint cavity</p> Signup and view all the answers

    Which gender is more commonly affected by injury to the cruciate ligaments?

    <p>Women</p> Signup and view all the answers

    What occurs to the femur when the foot is off the ground?

    <p>It laterally rotates on the tibia</p> Signup and view all the answers

    What is the role of the popliteus muscle in the knee joint?

    <p>It unlocks the knee joint by untwisting and slackening the major ligaments</p> Signup and view all the answers

    What happens to the menisci when the knee joint is in full extension?

    <p>They compress like rubber cushions between the femoral and tibial condyles</p> Signup and view all the answers

    What is the result of the major ligaments being twisted and tightened in the knee joint?

    <p>The knee joint becomes mechanically rigid</p> Signup and view all the answers

    What muscles produce medial rotation of the knee joint?

    <p>The sartorius, gracilis, and semitendinosus</p> Signup and view all the answers

    What is the limitation of flexion in the knee joint?

    <p>The contact of the back of the leg with the thigh</p> Signup and view all the answers

    What is the role of the quadriceps femoris in the knee joint?

    <p>It produces extension of the knee</p> Signup and view all the answers

    What happens to the menisci when the knee joint is in flexion?

    <p>They adapt their shape to the changing contour of the femoral condyles</p> Signup and view all the answers

    What is the function of the menisci in the knee joint?

    <p>To deepen the articular surfaces of the tibial condyles to receive the convex femoral condyles</p> Signup and view all the answers

    Where is the suprapatellar bursa located?

    <p>Beneath the quadriceps muscle and communicating with the joint cavity</p> Signup and view all the answers

    What is the purpose of the posterior cruciate ligament (PCL)?

    <p>To prevent anterior displacement of the femur on the tibia</p> Signup and view all the answers

    What is the function of the prepatellar bursa?

    <p>To reduce friction between the skin and the patella</p> Signup and view all the answers

    Where is the deep infrapatellar bursa located?

    <p>Between the ligamentum patellae and the tibia</p> Signup and view all the answers

    What is the shape of the menisci?

    <p>C-shaped</p> Signup and view all the answers

    Where is the popliteal bursa located?

    <p>In association with the tendon of the popliteus and communicating with the joint cavity</p> Signup and view all the answers

    What is the function of the superficial infrapatellar bursa?

    <p>To prevent friction between the skin and the patella</p> Signup and view all the answers

    What is the likely reason for the increased risk of injury to the collateral ligament in women?

    <p>Wider pelvis</p> Signup and view all the answers

    Which meniscus is more prone to damage?

    <p>Medial meniscus</p> Signup and view all the answers

    What is the characteristic of the joint cavity after an injury to the cruciate ligaments?

    <p>The joint cavity is filled with blood</p> Signup and view all the answers

    What is the movement of the tibia in relation to the femur when the posterior cruciate ligament is ruptured?

    <p>The tibia moves excessively backward on the femur</p> Signup and view all the answers

    What is the position of the medial meniscus during injury?

    <p>The medial meniscus is pulled into an abnormal position between the femoral and tibial condyles</p> Signup and view all the answers

    What is the influence of the female sex hormones on the risk of injury to the cruciate ligaments?

    <p>The female sex hormones increase the risk of injury</p> Signup and view all the answers

    What is the characteristic of the capsule during an injury to the cruciate ligaments?

    <p>The capsule is damaged</p> Signup and view all the answers

    What is the movement of the femur and tibia during an injury to the menisci?

    <p>The tibia is rotated on the femur</p> Signup and view all the answers

    What is the name of the bony structure visible in the lateral surface of the thigh that can be felt and moves beneath the examining finger as the hip joint is flexed and extended?

    <p>Greater trochanter</p> Signup and view all the answers

    Which nerve is visible in the posterior aspect of the knee in the provided magnetic resonance image?

    <p>Tibial nerve</p> Signup and view all the answers

    What is the name of the ligament that connects the patella to the lateral condyle of the femur?

    <p>Lateral collateral ligament</p> Signup and view all the answers

    What is the term for the solution used in the magnetic resonance image to enhance the visibility of the soft tissues?

    <p>Gadolinium</p> Signup and view all the answers

    Which muscle is located near the lateral meniscus of the knee joint?

    <p>Vastus lateralis</p> Signup and view all the answers

    What is the name of the artery that accompanies the tibial nerve in the posterior aspect of the knee?

    <p>Popliteal artery</p> Signup and view all the answers

    Which muscle is responsible for flexing the hip joint?

    <p>Sartorius</p> Signup and view all the answers

    Where is the anterosuperior iliac spine located in relation to the greater trochanter?

    <p>On a line connecting it to the ischial tuberosity</p> Signup and view all the answers

    What is the significance of the fold of the buttocks?

    <p>It is most prominent in the standing position</p> Signup and view all the answers

    What is the name of the bony structure that forms the lower limb girdle?

    <p>Pelvis</p> Signup and view all the answers

    What is the function of the sacroiliac joint?

    <p>It connects the hip bones to the trunk</p> Signup and view all the answers

    Where can the tip of the coccyx be palpated?

    <p>In the cleft between the buttocks, about 1 inch behind the anus</p> Signup and view all the answers

    What is the significance of the spinous processes of the sacrum?

    <p>They form the median sacral crest</p> Signup and view all the answers

    What is the relation of the iliac crest to the greater trochanter?

    <p>The iliac crest is on a line connecting the greater trochanter to the ischial tuberosity</p> Signup and view all the answers

    What is the location of the gluteal region?

    <p>On the posterior surface of the pelvis</p> Signup and view all the answers

    What is the significance of the ischial tuberosity?

    <p>It can be palpated in the lower part of the buttock</p> Signup and view all the answers

    What is the location of the medial and lateral menisci in the knee joint?

    <p>Between the femoral and tibial condyles</p> Signup and view all the answers

    What muscle bounds the lower part of the popliteal fossa?

    <p>Gastrocnemius</p> Signup and view all the answers

    What is the name of the ligament that connects the patella to the tibia?

    <p>Ligamentum patellae</p> Signup and view all the answers

    What is the location of the popliteal artery in the knee joint?

    <p>In the popliteal fossa</p> Signup and view all the answers

    What is the name of the muscle that lies lateral to the patella?

    <p>Vastus lateralis</p> Signup and view all the answers

    What is the name of the structure that forms the joint line between the ligamentum patellae and the medial and lateral collateral ligaments?

    <p>Joint line</p> Signup and view all the answers

    What is the name of the anterior border of the tibia?

    <p>Anterior border of the tibia</p> Signup and view all the answers

    What is the location of the patella in the knee joint?

    <p>Between the femoral and tibial condyles</p> Signup and view all the answers

    Which muscle is located near the adductor magnus tendon?

    <p>Semimembranosus</p> Signup and view all the answers

    Which nerve is located near the head of the fibula?

    <p>Common fibular nerve</p> Signup and view all the answers

    What is the anatomical structure that separates the femoral artery from the saphenous opening?

    <p>Adductor canal</p> Signup and view all the answers

    Which muscle is supplied by the posterior cutaneous nerve of the thigh?

    <p>Gluteus maximus</p> Signup and view all the answers

    What is the name of the bony structure that forms the lower limb girdle?

    <p>Os coxae</p> Signup and view all the answers

    Which of the following is NOT a landmark of the tensor fasciae latae muscle?

    <p>Ischial tuberosity</p> Signup and view all the answers

    What is the name of the tendon connected to the lateral malleolus?

    <p>Extensor hallucis longus tendon</p> Signup and view all the answers

    Which bone is connected to the medial malleolus?

    <p>Tibia</p> Signup and view all the answers

    What is the name of the tendon connected to the head of the talus?

    <p>Tibialis posterior tendon</p> Signup and view all the answers

    Which tendon is located near the medial malleolus?

    <p>Tibialis posterior tendon</p> Signup and view all the answers

    What is the name of the muscle connected to the extensor digitorum longus tendon?

    <p>Extensor digitorum</p> Signup and view all the answers

    Which tendon is connected to the talus bone?

    <p>Extensor hallucis longus tendon</p> Signup and view all the answers

    Study Notes

    Lower Limb Overview

    • The primary functions of the lower limbs are to support the body's weight and produce locomotion.
    • The lower limbs are stable and can bear the body's weight due to the strong sacroiliac joints and symphysis pubis.

    Organization of the Lower Limb

    • Each lower limb is organized into the gluteal region, the thigh, the popliteal region, the leg, the ankle, and the foot.
    • The thigh and leg are compartmentalized, with each compartment having its own muscles, nerve, and blood supply.

    Osteology of the Lower Limb

    • The bones of the lower limb are the os coxae (hip bone), femur, patella, tibia, fibula, metatarsal bones, tarsal bones, and phalanges.
    • The os coxae is topographically and functionally equivalent to the upper limb clavicle and scapula.
    • The os coxae forms the lower limb girdle that attaches the limb to the vertebral column.
    • The os coxae is composed of three skeletal elements: the ilium, ischium, and pubis.

    Os Coxae (Hip Bone)

    • The os coxae has a rough surface for attachment of muscles and ligaments.
    • The iliac crest is a site for interosseous ligament attachment.
    • The posterior superior iliac spine is a prominent landmark.
    • The ischial tuberosity is a characteristic feature of the ischium.
    • The pubis forms the anterior part of the os coxae.

    Lower Limb Problems

    • Lower limb problems are common and dealt with by health professionals in various fields.
    • Some common conditions encountered by physicians include arthritis, varicose veins, vascular deficiencies, fractures, dislocations, sprains, lacerations, knee effusions, leg pain, ankle injuries, and peripheral nerve injuries.

    Lower Limb

    • The superficial fascia of the thigh has a membranous layer that attaches to the deep fascia (fascia lata) about a fingerbreadth below the inguinal ligament.
    • The femoral triangle contains the femoral artery, femoral vein, and femoral canal.
    • The saphenous opening in the deep fascia is related to the femoral sheath.

    Lymph Drainage

    • Lymph from the superficial tissues of the lower limb and abdominal walls below the umbilicus drains into the external iliac nodes via the femoral canal.
    • The horizontal group of superficial inguinal lymph nodes is located above the inguinal ligament.
    • The vertical group of superficial inguinal lymph nodes is located below the inguinal ligament.

    Gluteal Region

    • The greater sciatic foramen is formed by the greater sciatic notch of the hip bone and the sacrotuberous and sacrospinous ligaments.
    • The sciatic nerve usually gives no branches in the gluteal region.
    • The posterior cutaneous nerve of the thigh enters the gluteal region through the lower part of the greater sciatic foramen.

    Nerves of the Gluteal Region

    • The superior gluteal nerve leaves the pelvis through the upper part of the greater sciatic foramen and supplies the gluteus medius and minimus muscles.
    • The inferior gluteal nerve leaves the pelvis through the lower part of the greater sciatic foramen and supplies the gluteus maximus muscle.
    • The nerve to the quadratus femoris leaves the pelvis through the lower part of the greater sciatic foramen and supplies the quadratus femoris and inferior gemellus muscles.

    Thigh

    • The thigh is the proximal segment of the lower limb, from the hip to the knee.
    • The femur is the bony core of the thigh.
    • The perforating veins prevent high-pressure venous blood from being forced outward into the low-pressure superficial veins.

    Anatomy of Ankle Vein Cutdown

    • The procedure involves blocking the sensory nerve supply to the skin in front of the medial malleolus of the tibia with local anesthetic.
    • A transverse incision is made through the skin and subcutaneous tissue across the long axis of the vein just anterior and superior to the medial malleolus.

    Varicose Veins

    • Varicose veins are superficial veins that have a larger diameter than normal and are elongated and tortuous.
    • Varicose veins commonly occur in the superficial veins of the lower limb and can cause discomfort and pain.
    • Causes of varicose veins include hereditary weakness of the vein walls, incompetent valves, and elevated pressure.

    Anatomy of Groin Vein Cutdown

    • The great saphenous vein is constantly found at a site 1.5 inches (4 cm) below and lateral to the pubic tubercle, where it joins the femoral vein.
    • The saphenous nerve usually lies just anterior to the vein.
    • The great saphenous vein passes through the saphenous opening to gain entrance to the femoral vein.

    Incision and Dissection

    • A transverse incision is made through the skin and subcutaneous tissue centered on a point about 1.5 inches (4 cm) below and lateral to the pubic tubercle.
    • The incision is carried medially just medial to the pulse if the femoral pulse can be felt.

    Superficial Inguinal Lymph Nodes

    • The superficial inguinal lymph nodes lie in the superficial fascia below the inguinal ligament.
    • They are divided into a horizontal and a vertical group.
    • The horizontal group lies just below and parallel to the inguinal ligament.
    • The medial members of the group receive superficial lymph vessels from the anterior abdominal wall below the level of the umbilicus and from the perineum.

    Deep Inguinal Lymph Nodes

    • The deep inguinal lymph nodes are variable in number, but there are commonly three.
    • They lie along the medial side of the terminal part of the femoral vein.
    • They receive all the lymph from the superficial inguinal nodes via lymph vessels that pass through the cribriform fascia of the saphenous opening.

    Action of Quadriceps Femoris Muscle

    • The quadriceps femoris muscle (consisting of the rectus femoris, the vastus intermedius, the vastus lateralis, and the vastus medialis) inserts into the patella and, via the ligamentum patellae (patellar ligament), attaches to the tibial tuberosity.
    • Together, they provide a powerful extensor of the knee joint.

    Posterior Fascial Compartment Muscles

    • The muscles of the posterior fascial compartment are collectively called the hamstrings.
    • The biceps femoris muscle has two heads: a long head (hamstring portion) and a short head (gluteal portion).
    • The biceps femoris muscle receives a dual nerve supply from the sciatic nerve.
    • The tibial nerve component innervates the long head, and the common fibular (peroneal) component supplies the short head.
    • The adductor magnus muscle also has two parts (an upper adductor part and a lower hamstring part) and a dual innervation.
    • The tibial nerve component of the sciatic nerve supplies the hamstring portion, and the obturator nerve supplies the adductor part.
    • The semimembranosus insertion sends a fibrous expansion upward and laterally, which reinforces the capsule on the back of the knee joint.

    Posterior Compartment Blood Supply

    • The four perforating branches of the profunda femoris artery provide a rich blood supply to this compartment.
    • The profunda femoris vein drains the greater part of the blood from the compartment.

    Posterior Compartment Nerve Supply

    • The sciatic nerve leaves the gluteal region and descends in the midline of the posterior compartment of the thigh.
    • The sciatic nerve is overlapped posteriorly by the adjacent margins of the biceps femoris and semimembranosus muscles and lies on the posterior aspect of the adductor magnus muscle.
    • The sciatic nerve ends in the lower third of the thigh by dividing into the separate tibial and common fibular (peroneal) nerves.
    • The tibial nerve supplies most of the posterior compartment of the thigh.
    • The common fibular nerve innervates only the short head of the biceps femoris.

    Popliteal Fossa

    • The popliteal fossa is bounded by the posterior aspect of the femur, the knee joint, and the popliteus muscle.
    • The contents of the popliteal fossa include the popliteal artery, popliteal vein, tibial nerve, and fascia.
    • The proximal end of the soleus muscle is shown in outline only.

    Clinical Notes

    • Popliteal aneurysms are thought to be caused by the pulsations of the wall of the femoral artery against the tendon of the adductor magnus at the opening of the adductor hiatus.
    • Semimembranosus bursa swelling is the most common swelling found in the popliteal space.
    • It can be distinguished from a Baker's cyst, which is centrally located and arises as a pathologic (osteoarthritis) diverticulum of the synovial membrane through a hole in the back of the capsule of the knee joint.

    Popliteus Muscle

    • Arises inside the capsule of the knee joint and inserts into the upper part of the posterior surface of the tibia
    • Separates the lateral ligament of the knee joint from the lateral meniscus
    • Responsible for "unlocking" the knee joint

    Posterior Tibial Artery

    • Lies on the posterior surface of the tibia below the tibialis posterior muscle
    • Covered only by skin and fascia in the lower part of the leg
    • Passes behind the medial malleolus deep to the flexor retinaculum
    • Terminate by dividing into medial and lateral plantar arteries

    Popliteal Fossa

    • Contains the popliteal artery and vein, as well as the tibial nerve
    • Formed by the popliteus muscle above and the posterior surface of the tibia below

    Structures That Pass Superficial to Extensor Retinaculum

    • Saphenous nerve and great saphenous vein
    • Superficial fibular (peroneal) nerve
    • Anterior tibial artery with venae comitantes
    • Extensor hallucis longus tendon
    • Tibialis anterior tendon

    Structures That Pass Deep to or through Extensor Retinaculum

    • Tibialis posterior tendon
    • Flexor digitorum longus tendon
    • Flexor hallucis longus tendon
    • Posterior tibial artery with venae comitantes
    • Tibial nerve
    • Constructed in the form of arches, enabling it to adapt to uneven surfaces and absorb shocks
    • The skin of the sole of the foot is thick and hairless, firmly bound down to the underlying deep fascia
    • Sole muscles are described in four layers, from superficial to deep

    Plantar Aponeurosis

    • A triangular thickening of the deep fascia that protects the underlying nerves, blood vessels, and muscles
    • Attaches to the medial and lateral tubercles of the calcaneum
    • Divides into five slips that pass into the toes

    Plantar Arteries and Veins

    • Plantar arch gives off plantar metatarsal arteries to the toes
    • Medial and lateral plantar veins accompany the corresponding arteries and unite behind the medial malleolus to form the posterior tibial venae comitantes

    Nerves of Sole

    • Tibial nerve passes behind the medial malleolus and terminates by dividing into the medial and lateral plantar nerves
    • Medial plantar nerve supplies the skin of the medial three and a half toes and the nail beds
    • Lateral plantar nerve supplies the skin of the lateral one and a half toes and the nail beds

    Dorsal Surface of the Foot

    • Skin is thin, hairy, and freely mobile on the underlying tendons and bones
    • Sensory nerve supply is derived from the superficial fibular (peroneal) nerve, assisted by the deep fibular (peroneal), saphenous, and sural nerves

    Dorsal Nerve Supply

    • Superficial fibular (peroneal) nerve supplies the skin on the dorsum of the foot, the medial side of the big toe, and the adjacent sides of the second, third, fourth, and fifth toes
    • Deep fibular (peroneal) nerve supplies the skin of the adjacent sides of the big and second toes
    • Saphenous nerve supplies the skin along the medial side of the foot as far forward as the head of the first metatarsal bone
    • Sural nerve supplies the skin along the lateral margin of the foot and the lateral side of the little toe

    Dorsum Arterial Supply

    • Dorsalis pedis artery is the continuation of the anterior tibial artery and supplies the dorsum of the foot
    • It is superficial in position and is crossed by the inferior extensor retinaculum and the first tendon of extensor digitorum brevis

    Dorsal Venous Arch (or Network)

    • Formed by the union of the end of the lateral plantar artery and the dorsalis pedis artery to complete the plantar arterial arch

    Long Extensor Tendon Insertion

    • Tendon of extensor digitorum longus passes deep to the superior extensor retinaculum and through the extensor expansion
    • The extensor expansion, as in the fingers, receives the tendons of insertion of the interosseous and lumbrical muscles

    Knee Joint

    • The posterior intercondylar area of the tibia passes upward, forward, and medially to attach to the anterior part of the lateral surface of the medial femoral condyle.
    • The posterior cruciate ligament (PCL) prevents anterior displacement of the femur on the tibia.

    Anterior Bursae

    • The suprapatellar bursa lies beneath the quadriceps muscle and communicates with the joint cavity.
    • The prepatellar bursa lies in the subcutaneous tissue between the skin and the front of the lower half of the patella and the upper part of the ligamentum patellae.
    • The superficial infrapatellar bursa lies in the subcutaneous tissue between the skin and the front of the lower part of the ligamentum patellae.
    • The deep infrapatellar bursa lies between the ligamentum patellae and the tibia.

    Menisci

    • The menisci are C-shaped sheets of fibrocartilage.
    • The peripheral border is thick and attached to the capsule, and the inner border is thin and concave and forms a free edge.
    • The upper surfaces are in contact with the femoral condyles, and the lower surfaces are in contact with the tibial condyles.
    • The menisci deepen the articular surfaces of the tibial condyles to receive the convex femoral condyles and serve as cushions between the two bones and distribute forces transmitted through the joint.

    Posterior Bursae

    • The popliteal bursa is found in association with the tendon of the popliteus and communicates with the joint cavity.

    Movement and Stability

    • In the position of full extension, the femur medially rotates on the tibia, resulting in a twisting and tightening of all the major ligaments of the joint, and the knee becomes a mechanically rigid structure.
    • The cartilaginous menisci are compressed like rubber cushions between the femoral and tibial condyles.
    • The fully extended knee is said to be in the locked and stabilized position.
    • Before flexion of the knee joint can occur, it is essential that the major ligaments be untwisted and slackened to permit movements between the joint surfaces.

    Flexion

    • The biceps femoris, semitendinosus, and semimembranosus muscles, assisted by the gracilis, sartorius, and popliteus muscles, produce flexion.
    • Flexion is limited by the contact of the back of the leg with the thigh.

    Extension

    • The quadriceps femoris produces extension.
    • Extension is limited by the tension of all the major ligaments of the joint.

    Medial Rotation

    • The sartorius, gracilis, and semitendinosus muscles produce medial rotation.

    Lateral Rotation

    • The biceps femoris produces lateral rotation.

    Important Relations

    • Anteriorly: The prepatellar bursa.
    • Posteriorly: The popliteal vessels; tibial and common fibular nerves; lymph nodes; and the muscles that form the boundaries of the popliteal fossa.
    • Medially: Sartorius, gracilis, and semitendinosus muscles.
    • Laterally: Biceps femoris and common fibular nerve.

    Clinical Notes

    • Knee Joint Strength: The strength of the knee joint depends on the tone of the muscles acting on the joint and the strength of the ligaments that bind the femur to the tibia.
    • The quadriceps femoris is the most important muscle group.
    • Knee Injury and Synovial Membrane: Damage to the articular surfaces, menisci, or ligaments of the joint results in distension of the synovial cavity with fluid.

    Ligamentous Injury of Knee Joint

    • The four ligaments (medial collateral ligament, lateral collateral ligament, ACL, and PCL) are commonly injured.
    • Tears of the ACL are common, especially in women, and may be explained by the different alignment of the thigh on the leg.
    • Tears of the PCL are less common.

    Meniscal Injury

    • Injuries of the menisci are common, with the medial meniscus damaged more frequently than the lateral.
    • The injury occurs when the femur is rotated on the tibia or the tibia is rotated on the femur, with the knee joint partially flexed and taking the weight of the body.

    Surface Anatomy of the Knee

    • The patella, patellar surface of the femur, and vastus medialis can be identified in a transverse (axial) proton density magnetic resonance image of the right knee.
    • The lateral collateral ligament, vastus lateralis, edge of the lateral meniscus, and biceps femoris are also visible in the image.
    • The posterior cruciate ligament, popliteal artery and vein, and tibial nerve are located in the knee joint.

    Surface Anatomy of the Hip and Gluteal Region

    • The greater trochanter of the femur can be felt on the lateral surface of the thigh and moves beneath the examining finger as the hip joint is flexed and extended.
    • The upper border of the greater trochanter lies on a line connecting the anterosuperior iliac spine to the ischial tuberosity.
    • The spinous process of the sacrum is fused with each other to form the median sacral crest, which can be felt beneath the skin in the upper part of the cleft between the buttocks.
    • The tip of the coccyx can be palpated beneath the skin in the cleft between the buttocks about 1 inch (2.5 cm) behind the anus.

    Surface Anatomy of the Thigh

    • The iliac crest is easily palpable along its entire length, ending in front at the anterosuperior iliac spine and behind at the posterior iliac spine.
    • The ischial tuberosity can be palpated in the lower part of the buttock.
    • The sacral nerve in the buttock lies under the cover of the gluteus maximus muscle.
    • The popliteal artery can be felt by gentle palpation in the depths of the popliteal fossa, provided that the deep fascia is fully relaxed by passively flexing the knee joint.

    Surface Anatomy of the Lower Leg

    • The medial and lateral condyles of the femur, patella, and medial and lateral collateral ligaments can be identified in the anterior aspect of the right knee.
    • The tibial tuberosity, anterior border of the tibia, and subcutaneous surface of the tibia can be palpated.
    • The head of the fibula, biceps femoris, and common fibular nerve can be identified in the lateral aspect of the knee.
    • The medial malleolus, lateral malleolus, and tendo calcaneus can be palpated in the lower leg.
    • The extensor hallucis longus tendon, extensor digitorum longus tendons, and tibialis anterior tendon can be identified in the lower leg.

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    Description

    This quiz covers the bones and joints of the lower limb, including their development and major features. It also compares the lower limb with the upper limb.

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