L4 Leg
81 Questions
11 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What prevents backflow of blood in the veins of the lower limb?

  • Valves in limb veins (correct)
  • Gravity and vein elasticity
  • Muscle contraction only
  • High pressure in the veins

Which nerve is responsible for ankle eversion?

  • Peroneal nerve
  • Deep fibular nerve
  • Superficial fibular nerve (correct)
  • Tibial nerve

What is a common consequence of muscle contraction in the leg?

  • Decreased blood flow to the heart
  • Assistance in blood flow against gravity (correct)
  • Increased venous pressure
  • Dilation of superficial veins

Which condition is characterized by swelling of veins?

<p>Varicose veins (A)</p> Signup and view all the answers

Which of the following movements is primarily associated with the tibialis anterior muscle?

<p>Inversion (D)</p> Signup and view all the answers

What is the primary role of the interosseous membrane between the tibia and fibula?

<p>It provides surface for muscle attachment. (D)</p> Signup and view all the answers

Which bone is not considered a tarsal bone?

<p>Fibula (A)</p> Signup and view all the answers

In which compartment of the leg does the Tibialis Anterior muscle primarily reside?

<p>Anterior compartment (C)</p> Signup and view all the answers

What is the anatomical significance of the fibrous joint at the distal ends of the tibia and fibula?

<p>It provides stability and limits movement. (B)</p> Signup and view all the answers

Which of the following statements about the leg compartments is true?

<p>Intermuscular septa separate the various leg compartments. (C)</p> Signup and view all the answers

Which joints are primarily involved in ankle motion?

<p>Talocrural joints (B)</p> Signup and view all the answers

What does the crural fascia over the anterior tibia do?

<p>It fuses with the periosteum of the tibia. (A)</p> Signup and view all the answers

Which of the following is true regarding the anatomy of the anterior leg?

<p>The tibia is subcutaneous and often referred to as the 'shin'. (A)</p> Signup and view all the answers

What is the distal attachment of the muscle that crosses the plantar foot?

<p>Base of the 1st metatarsal and medial cuneiform bones (B)</p> Signup and view all the answers

Which of the following muscles primarily facilitates plantarflexion at the ankle?

<p>Soleus (C)</p> Signup and view all the answers

What is the origin of the gastrocnemius muscle?

<p>Medial and lateral femoral condyles (D)</p> Signup and view all the answers

What action does the gastrocnemius muscle perform at the knee?

<p>Flexion (B)</p> Signup and view all the answers

Which nerve innervates the gastrocnemius muscle?

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

What bursa lies between the calcaneus and the tendo-Achilles?

<p>Tendocalcaneal bursa (C)</p> Signup and view all the answers

What is the distal attachment of the plantaris muscle?

<p>Posterior calcaneus (C)</p> Signup and view all the answers

Which muscle is NOT part of the superficial group of posterior leg muscles?

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

What is the primary role of the sural nerve at the ankle?

<p>Innervates the lateral side of the foot (D)</p> Signup and view all the answers

Which muscle does the common fibular nerve wrap around at the head of the fibula?

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

Which branches does the common fibular nerve split into?

<p>Deep and superficial branches (C)</p> Signup and view all the answers

What is the main function of the superficial fibular nerve?

<p>Innervates both fibularis muscles (D)</p> Signup and view all the answers

Where does the deep fibular nerve primarily travel?

<p>Deep between the tibialis anterior and fibularis longus (C)</p> Signup and view all the answers

What structure does the deep fibular nerve accompany as it passes into the foot?

<p>Anterior tibial artery (A)</p> Signup and view all the answers

Which arteries branch off from the popliteal artery?

<p>Anterior, posterior tibial, and fibular (A)</p> Signup and view all the answers

What area does the deep fibular nerve innervate?

<p>All anterior compartment muscles (B)</p> Signup and view all the answers

What is the primary action associated with the flexor digitorum longus muscle?

<p>Flexion of the small toes (C)</p> Signup and view all the answers

Which structure is the distal attachment for the tibialis posterior?

<p>Medial cuneiform (A)</p> Signup and view all the answers

Which nerve passes deep to the flexor retinaculum at the ankle?

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

What forms the tarsal tunnel in the ankle?

<p>Flexor retinaculum (A)</p> Signup and view all the answers

Which of the following correctly describes the action of the flexor hallucis longus muscle?

<p>Flexion of the distal phalanx of the great toe (A)</p> Signup and view all the answers

Where does the tibial nerve travel in relation to the muscle groups in the posterior leg?

<p>Between the superficial and deep posterior muscle groups (C)</p> Signup and view all the answers

Which nerve communicates with the medial sural cutaneous branch to form the sural nerve?

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

What is not a structure affected by the tendons of the deep posterior leg muscles?

<p>Lateral cuneiform (B)</p> Signup and view all the answers

Which muscle in the leg is primarily responsible for dorsiflexion of the foot?

<p>Tibialis Anterior (C)</p> Signup and view all the answers

Which nerve provides innervation to the muscles in the anterior compartment of the leg?

<p>Deep Fibular Nerve (D)</p> Signup and view all the answers

During knee flexion, which action is primarily facilitated by the sartorius and other leg muscles?

<p>Lateral rotation of the tibia (B), Medial rotation of the tibia (C)</p> Signup and view all the answers

Which muscle is responsible for flexing the knee while also assisting in ankle plantarflexion?

<p>Gastrocnemius (C)</p> Signup and view all the answers

What movement occurs at the ankle joint primarily during the action of standing on tiptoes?

<p>Plantarflexion (C)</p> Signup and view all the answers

What is the primary action associated with the extensor hallucis longus muscle?

<p>Dorsiflexion and extension of the great toe (D)</p> Signup and view all the answers

Which muscle attaches to the tuberosity of the base of the 5th metatarsal bone?

<p>Fibularis brevis (A)</p> Signup and view all the answers

Which muscle provides primary stabilization of the ankle joint during walking, by preventing excessive supination?

<p>Tibialis Posterior (A)</p> Signup and view all the answers

What is the main function of the flexor digitorum longus muscle in the leg?

<p>Flexion of the toes (C)</p> Signup and view all the answers

Which nerve innervates the muscles in the anterior compartment of the leg?

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

What is the origin of the tibialis anterior muscle?

<p>Interosseous membrane and anterior tibia (D)</p> Signup and view all the answers

What movement pattern is primarily facilitated by the extensor digitorum longus muscle?

<p>Dorsiflexion and eversion (D)</p> Signup and view all the answers

Which muscle is involved in both plantarflexion and eversion of the foot?

<p>Fibularis longus (C)</p> Signup and view all the answers

Which structure has a distal attachment to the dorsal digital expansions of the lateral 4 toes?

<p>Extensor digitorum longus (C)</p> Signup and view all the answers

Which muscle primarily facilitates ankle inversion?

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

What is the primary action of the deep fibular nerve?

<p>Dorsiflexion of the ankle (B)</p> Signup and view all the answers

Which nerve is responsible for innervating the muscles responsible for ankle dorsiflexion?

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

What action is primarily limited when the superficial fibular nerve is injured?

<p>Ankle eversion (A)</p> Signup and view all the answers

Which muscle is primarily responsible for knee flexion and ankle plantarflexion?

<p>Soleus (D)</p> Signup and view all the answers

Which structure separates the anterior and posterior compartments of the leg and is crucial for muscle function?

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

What is the primary muscle for producing foot eversion?

<p>Peroneus longus (B)</p> Signup and view all the answers

During a heel raise, which joint primarily undergoes plantarflexion?

<p>Ankle joint (B)</p> Signup and view all the answers

Which of the following nerves innervates the muscle responsible for foot inversion?

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

Which muscle is primarily involved in both knee flexion and foot plantarflexion?

<p>Plantaris (A)</p> Signup and view all the answers

What specific action does the popliteus muscle perform when the foot is on the ground and the knee joint is in full extension?

<p>Unlocks the knee joint through medial rotation of the femur (B)</p> Signup and view all the answers

Which muscle is primarily responsible for unlocking the knee joint during flexion from a fully extended position?

<p>Popliteus (B)</p> Signup and view all the answers

What is the innervation of the deep posterior leg muscles?

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

During weight bearing in a fully extended knee, which rotational movement occurs if the femur is unable to move further?

<p>Medial rotation of the femur (B)</p> Signup and view all the answers

Which statement best describes the anatomical position of the popliteus muscle?

<p>Inserts at the posterior aspect of the tibia (B)</p> Signup and view all the answers

What function does the tibialis posterior muscle primarily serve in relation to the ankle joint?

<p>Plantarflexion and inversion of the foot (C)</p> Signup and view all the answers

How does the flexor digitorum longus differ in its primary function compared to the flexor hallucis longus?

<p>Primarily flexes the lesser toes (A)</p> Signup and view all the answers

During the movement of unlocking the knee joint, which direction does the tibia rotate if the foot is off the ground?

<p>Medially rotates on the femur (A)</p> Signup and view all the answers

What role does the interosseous membrane play between the tibia and fibula?

<p>Provides stability and muscle attachment (A)</p> Signup and view all the answers

What is the primary function of the flexor hallucis longus muscle?

<p>Plantarflexion of the ankle (C)</p> Signup and view all the answers

What is the primary action of the gastrocnemius muscle?

<p>Plantarflexion and slight knee flexion (B)</p> Signup and view all the answers

Which muscle has a proximal attachment at the posterior calcaneus?

<p>Soleus (C)</p> Signup and view all the answers

Which nerve innervates the soleus muscle?

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

Where does the plantaris muscle attach distally?

<p>Posterior calcaneus (C)</p> Signup and view all the answers

What movement is primarily produced by the contraction of the soleus muscle?

<p>Plantarflexion of the ankle (D)</p> Signup and view all the answers

What is the combined action of the gastrocnemius and soleus muscles during flexion at the knee?

<p>Plantarflexion with knee flexion (B)</p> Signup and view all the answers

Which structure lies between the calcaneus and the tendo-Achilles?

<p>Tendocalcaneal bursa (B)</p> Signup and view all the answers

Which function is associated with the medial and lateral heads of the gastrocnemius?

<p>Knee flexion and plantarflexion (C)</p> Signup and view all the answers

What anatomical feature assists in stabilizing movements at the ankle during plantarflexion?

<p>Retinacula (B)</p> Signup and view all the answers

Which group of muscles in the posterior leg is primarily responsible for both ankle plantarflexion and knee flexion?

<p>Superficial group including gastrocnemius (C)</p> Signup and view all the answers

Flashcards

Leg

The area of the body between the knee and the ankle, consisting of bones, muscles, nerves, and blood vessels.

What muscles make up the anterior compartment of the leg?

The tibialis anterior, extensor digitorum longus, extensor hallucis longus, and peroneus tertius muscles, located on the anterior aspect of the leg, responsible for dorsiflexion and toe extension.

What muscles make up the posterior compartment of the leg?

The gastrocnemius, soleus, plantaris, and popliteus muscles, located on the posterior aspect of the leg, responsible for plantarflexion and ankle stability.

What muscles make up the lateral compartment of the leg?

The peroneus longus and peroneus brevis muscles, located on the lateral aspect of the leg, responsible for eversion (turning the sole of the foot outwards) and ankle stability.

Signup and view all the flashcards

What nerve innervates the anterior compartment of the leg?

The deep peroneal nerve, a branch of the common peroneal nerve, responsible for innervating the anterior compartment muscles of the leg.

Signup and view all the flashcards

What is the interosseous membrane?

A strong fibrous membrane that connects the tibia and fibula, providing surface for muscle attachment and separating the anterior and posterior compartments of the leg.

Signup and view all the flashcards

Where does dorsiflexion occur?

Occurs at the joint between the tibia, fibula, and talus (ankle joint).

Signup and view all the flashcards

Where does eversion occur?

Occurs at the joints between the talus, calcaneus, and navicular bones.

Signup and view all the flashcards

What is compartment syndrome?

A condition where increased pressure within a muscle compartment can cause nerve and blood vessel damage.

Signup and view all the flashcards

How are the bones of the foot organized?

The bones of the foot can be divided into three regions: tarsal bones, metatarsal bones, and phalanges.

Signup and view all the flashcards

Which bone is the tibia?

The most medial bone of the lower leg.

Signup and view all the flashcards

What is the fibula?

The most lateral bone of the lower leg. It serves as a site for muscle attachment and helps stabilize the ankle.

Signup and view all the flashcards

What is the crural fascia?

A layer of fibrous connective tissue that surrounds the muscles of the leg, helping to compartmentalize them, and provides support and allows for movement.

Signup and view all the flashcards

Tendon

A strong band of connective tissue that attaches muscles to bones.

Signup and view all the flashcards

Deep Posterior Leg Muscles Tendon Location

The tendons of the three deep posterior leg muscles (tibialis posterior, flexor digitorum longus, and flexor hallucis longus) all pass to the medial side of the ankle.

Signup and view all the flashcards

Tibialis Posterior Insertion & Action

The tibialis posterior muscle attaches to the navicular tuberosity and adjacent structures, causing inversion of the foot.

Signup and view all the flashcards

Flexor Digitorum Longus Insertion & Action

The flexor digitorum longus muscle attaches to the distal phalanges of the smaller toes, flexing those toes.

Signup and view all the flashcards

Flexor Hallucis Longus Insertion & Action

The flexor hallucis longus muscle attaches to the distal phalanx of the great toe, flexing the big toe.

Signup and view all the flashcards

Tarsal Tunnel

A tunnel formed by the flexor retinaculum attaching between the medial malleolus and calcaneus.

Signup and view all the flashcards

Tarsal Tunnel Contents Mnemonic

The mnemonic "Tom Dick AN’ Harry" helps remember the structures that pass through the tarsal tunnel: Tibialis Posterior, Flexor Digitorum Longus, Posterior Tibial Artery, Nerve, and Flexor Hallucis Longus

Signup and view all the flashcards

Flexor Retinaculum

A thick band of connective tissue that holds the tendons of the deep posterior leg muscles together as they cross the ankle.

Signup and view all the flashcards

What is the Distal Attachment for the Peroneus Longus Muscle?

A muscle that extends from the lateral condyle of the femur, crosses the plantar foot, and inserts on the base of the 1st metatarsal and medial cuneiform bones.

Signup and view all the flashcards

What is the Primary Action of the Peroneus Longus Muscle?

The action of the Peroneus Longus muscle includes plantarflexion and eversion of the foot.

Signup and view all the flashcards

What is the Origin and Insertion of the Gastrocnemius Muscle?

The Gastrocnemius muscle arises from the medial and lateral femoral condyles posteriorly, and combines with the Soleus muscle to form the Achilles tendon.

Signup and view all the flashcards

What is the Primary Action of the Gastrocnemius Muscle?

The primary function of the Gastrocnemius muscle, along with its partner the Soleus, is plantarflexion of the foot.

Signup and view all the flashcards

Does the Gastrocnemius Muscle Have Any Additional Actions?

The Gastrocnemius muscle also assists in knee flexion.

Signup and view all the flashcards

What is the Origin of the Plantaris Muscle?

The Plantaris is a small muscle that originates from the proximal part of the lateral femoral condyle.

Signup and view all the flashcards

What is the Primary Action of the Plantaris Muscle?

The primary function of the Plantaris muscle is plantarflexion of the foot.

Signup and view all the flashcards

What is the Origin and Insertion of the Soleus Muscle?

The Soleus muscle originates from the proximal tibia and fibula, and inserts on the posterior calcaneus.

Signup and view all the flashcards

Venous Return

The flow of blood back to the heart.

Signup and view all the flashcards

One-Way Valves in Veins

Valves in the veins of the limbs that prevent blood from flowing backward. They help ensure blood flows towards the heart, especially against gravity.

Signup and view all the flashcards

Varicose Veins

A condition where veins become abnormally enlarged and swollen, often due to weakened valves.

Signup and view all the flashcards

Muscle Contractions and Venous Return

The process by which muscle contractions help to move blood back to the heart, especially in the lower limbs.

Signup and view all the flashcards

Leg Compartments

The anterior, posterior, and lateral compartments of the leg are separated by connective tissue and contain distinct muscles, nerves, and blood vessels.

Signup and view all the flashcards

Where is the sural nerve located?

The sural nerve is located on the lateral side of the ankle, posterior to the lateral malleolus. This nerve innervates the lateral side of the foot. It's commonly used for nerve grafts due to its accessibility and relatively long length.

Signup and view all the flashcards

Describe the path of the common fibular nerve.

The common fibular nerve, located along the distal tendon of the biceps femoris muscle, wraps around the head of the fibula before entering the fibularis longus muscle. It splits into two branches, the superficial fibular nerve and the deep fibular nerve.

Signup and view all the flashcards

What is the function of the superficial fibular nerve?

The superficial fibular nerve travels distally in the lateral compartment of the leg and innervates both fibularis muscles. This branch plays a role in ankle eversion, which is moving the sole of the foot outwards.

Signup and view all the flashcards

Where does the deep fibular nerve travel and what does it innervate?

The deep fibular nerve travels across the lateral compartment of the leg, through the intermuscular septum, to the anterior compartment. It innervates all the muscles in this anterior compartment, which play a role in dorsiflexion and extension of the toes.

Signup and view all the flashcards

How does the deep fibular nerve enter the foot?

The deep fibular nerve passes through the extensor retinaculum and enters the foot together with the anterior tibial artery. This indicates that the deep fibular nerve is important for both muscle function and blood supply to the anterior foot.

Signup and view all the flashcards

What are the main branches of the popliteal artery?

The popliteal artery branches off into three main arteries in the leg: the anterior tibial artery, the posterior tibial artery, and the fibular artery. These arteries supply blood to the various compartments of the lower leg and foot.

Signup and view all the flashcards

What part of the leg does each artery supply?

The anterior tibial artery supplies the anterior compartment of the leg. The posterior tibial artery supplies the posterior compartment of the leg. The fibular artery supplies the lateral compartment of the leg.

Signup and view all the flashcards

What is the role of the perforating branches of the popliteal artery?

The perforating branches of the popliteal artery provide blood supply to the muscles that help maintain stability and movement in the knee and ankle joints.

Signup and view all the flashcards

Interosseous Membrane

The interosseous membrane is a strong fibrous sheet that connects the tibia and fibula, providing a surface for muscle attachment and separating the anterior and posterior compartments of the leg.

Signup and view all the flashcards

Ankle Joint Location

The distal ends of the tibia and fibula form the ankle joint (talocrural joint).

Signup and view all the flashcards

Compartment Syndrome

A condition caused by increased pressure inside a muscle compartment, potentially compressing blood vessels and nerves.

Signup and view all the flashcards

Anterior Leg Compartment

The anterior compartment of the leg is located lateral to the shaft of the tibia, and contains muscles involved in dorsiflexion and toe extension.

Signup and view all the flashcards

Posterior Leg Compartment

The posterior compartment of the leg is located behind the tibia and fibula, and contains muscles involved in plantarflexion.

Signup and view all the flashcards

Lateral Leg Compartment

The lateral compartment of the leg is located on the outside of the leg, and contains muscles involved in eversion (turning the foot outwards).

Signup and view all the flashcards

Crural Fascia

The crural fascia is a strong layer of connective tissue that surrounds the muscles of the leg, helping to compartmentalize them and provide support.

Signup and view all the flashcards

Deep vs. Superficial Posterior Leg Muscles

The deep posterior leg muscles are those located directly on the bones, while the superficial posterior leg muscles are those located on top of the deep muscles.

Signup and view all the flashcards

What is the function of the popliteus muscle?

The popliteus muscle unlocks the knee joint by laterally rotating the femur on the tibia when in full extension.

Signup and view all the flashcards

Where does the popliteus muscle originate and insert?

The popliteus muscle originates on the posterior tibia and inserts on the lateral epicondyle of the femur.

Signup and view all the flashcards

What nerve innervates the popliteus muscle?

The popliteus muscle is innervated by the tibial nerve.

Signup and view all the flashcards

Where does the tibialis posterior muscle originate?

The tibialis posterior muscle originates from the posterior tibia, fibula, and interosseous membrane.

Signup and view all the flashcards

Where does the tibialis posterior muscle insert and what is its action?

The tibialis posterior muscle inserts on the navicular tuberosity and adjacent structures, causing inversion of the foot.

Signup and view all the flashcards

What nerve innervates the tibialis posterior muscle?

The tibialis posterior muscle is innervated by the tibial nerve.

Signup and view all the flashcards

Where does the flexor digitorum longus muscle originate?

The flexor digitorum longus muscle originates from the posterior tibia, fibula, and interosseous membrane.

Signup and view all the flashcards

Where does the flexor digitorum longus muscle insert and what is its action?

The flexor digitorum longus muscle inserts on the distal phalanges of the smaller toes, flexing those toes.

Signup and view all the flashcards

What nerve innervates the flexor digitorum longus muscle?

The flexor digitorum longus muscle is innervated by the tibial nerve.

Signup and view all the flashcards

Where does the flexor hallucis longus muscle originate?

The flexor hallucis longus muscle originates from the posterior fibula and interosseous membrane.

Signup and view all the flashcards

Deep Fibular Nerve

The deep fibular nerve, a branch of the common peroneal nerve, travels through the leg and innervates the muscles responsible for dorsiflexion and extension of the toes.

Signup and view all the flashcards

Superficial Fibular Nerve

The superficial fibular nerve, a branch of the common peroneal nerve, travels through the leg and innervates the muscles responsible for eversion of the foot.

Signup and view all the flashcards

Anterior Tibial Artery

The anterior tibial artery supplies blood to the anterior compartment of the leg, which contains the muscles involved in dorsiflexion.

Signup and view all the flashcards

Posterior Tibial Artery

The posterior tibial artery supplies blood to the posterior compartment of the leg, which contains the muscles involved in plantarflexion.

Signup and view all the flashcards

Fibular Artery

The fibular artery supplies blood to the lateral compartment of the leg, which contains the muscles involved in eversion.

Signup and view all the flashcards

Tibialis Anterior

A muscle in the anterior compartment of the leg that dorsiflexes and inverts the foot, attaching to the medial aspect of the foot.

Signup and view all the flashcards

Extensor Digitorum Longus

A long muscle in the anterior compartment of the leg that dorsiflexes the foot and extends the four lateral toes.

Signup and view all the flashcards

Extensor Hallucis Longus

A muscle in the anterior compartment of the leg that dorsiflexes the foot and extends the big toe.

Signup and view all the flashcards

Fibularis Tertius

A muscle that dorsiflexes and everts the foot, attaching to the base of the 5th metatarsal.

Signup and view all the flashcards

Fibularis Muscles

Muscles that originate from the fibula and help to evert the foot.

Signup and view all the flashcards

Where does the Peroneus Longus muscle attach?

The Peroneus Longus muscle crosses the plantar foot to attach to the base of the 1st metatarsal and medial cuneiform bones.

Signup and view all the flashcards

What is the action of the Peroneus Longus muscle?

The Peroneus Longus muscle acts to plantarflex and evert (turn outward) the foot.

Signup and view all the flashcards

What are the origin and insertion of the Gastrocnemius muscle?

The Gastrocnemius muscle originates from the medial and lateral femoral condyles posteriorly and inserts on the posterior calcaneus via the Achilles tendon.

Signup and view all the flashcards

What is the main action of the Gastrocnemius muscle?

The Gastrocnemius muscle is a primary plantarflexor of the foot and also assists with knee flexion.

Signup and view all the flashcards

Where does the Plantaris muscle originate and insert?

The Plantaris muscle originates from the proximal part of the lateral femoral condyle, like the lateral head of the Gastrocnemius muscle, and inserts on the calcaneus.

Signup and view all the flashcards

What is the action of the Plantaris muscle?

The Plantaris muscle is also a plantarflexor of the foot.

Signup and view all the flashcards

What is the main action of the Soleus muscle?

The Soleus muscle acts as a primary plantarflexor of the foot, working in coordination with the Gastrocnemius.

Signup and view all the flashcards

What is the Tendocalcaneal bursa, and where is it located?

The Tendocalcaneal bursa is a fluid-filled sac located between the calcaneus (heel bone) and the tendo-Achilles (Achilles tendon) to reduce friction.

Signup and view all the flashcards

What differentiates Deep Posterior Leg Muscles from Superficial Posterior Leg Muscles?

Deep posterior leg muscles, like the Tibialis Posterior, Flexor Digitorum Longus, and Flexor Hallucis Longus, are located deep to the superficial muscles, closer to the bones.

Signup and view all the flashcards

Study Notes

Notice and Agreement

  • The lecture session is being recorded.
  • Recordings are for exclusive student use at LMU DeBusk College of Osteopathic Medicine.
  • Student access is conditional on agreeing to the terms and conditions.
  • Students who do not agree cannot access or use the recordings.
  • Students using recordings acknowledge faculty intellectual property rights.
  • Distribution of recordings violates DCOM copyright policy.
  • Recordings respect privacy rights of fellow students.
  • Sharing recordings with unauthorized parties is an Honor Code violation.
  • Recordings can only be used as directed by the faculty member.
  • Course name, lecture number, and title are to be used exactly as listed on LMU-DCOM website.

Learning Objectives - Leg

  • Describe the location of cutaneous nerves and veins in the leg.
  • Identify key bony landmarks in the leg and ankle.
  • Identify leg muscles, their attachments, nerve supply, and actions.
  • Describe the organization of the leg's muscular compartments, their common function, and nerve/arterial supply.

Tibia and Fibula - Cross Section

  • Interosseous membrane holds tibia and fibula together.
  • Provides surface for muscle attachments.
  • Separates anterior from posterior compartments.

Tibia and Fibula - Distal

  • Tibiofibular syndesmosis (fibrous joint) connects tibia and fibula.
  • Lateral and medial malleoli form the ankle mortise.
  • Malleolar groove accommodates tibialis posterior tendon.

Foot Bones Regions

  • Tarsal bones (calcaneus, talus, navicular, cuboid, medial cuneiform, intermediate cuneiform, lateral cuneiform).
  • Metatarsals.
  • Phalanges.
  • Regions for anatomical and clinical considerations.

Foot Bones

  • Multiple images of foot bones, showing details of individual bones.
  • Identifying anatomical landmarks/features on multiple views of foot bones.
  • Includes information on the foot regions (forefoot, midfoot, hindfoot) to understand the structural relationship.

Leg Compartments

  • Anterior, lateral, deep posterior, and superficial posterior compartments are identified.
  • Includes descriptions of intermuscular septa and crura fascia.
  • Relationships between bony landmarks and muscle compartments.
  • Relationships of nerves and blood vessels passing through various compartments.

Ankle Motions

  • Dorsiflexion and plantarflexion occur at the talocrural joints.
  • Inversion and eversion occur at the subtalar and talocalcaneonavicular joints.

Anterior Leg

  • Tibia is positioned medially within the anterior compartment.
  • Lateral to the tibial shaft, and is subcutaneous ("shin").

Anterior Leg - Proximal Attachments

  • Anterior tibia and fibula, and the interosseous membrane.
  • Diagrams/Images illustrating the proximal attachments within the anterior compartment.

Anterior Leg - Distal Attachments/Actions

  • Tibialis anterior, Extensor hallucis longus, Extensor digitorum longus, and Fibularis tertius muscles and distal attachments, and actions.

Lateral Leg

  • Fibularis longus and brevis muscles, and location of superficial fibular nerve.
  • Distal attachment sites and functions (plantarflexion and eversion) are detailed.

Fibularis Longus m - Distal Attachment

  • Passes under cuboid bone in groove, attaches to base of 1st metatarsal, and medial cuneiform.
  • Action - plantarflexion and eversion.

Retinacula at the Ankle

  • Superior and inferior extensor retinacula, and superior and inferior fibular retinacula.
  • Detailed description/diagram of the retinacula.
  • Relationships between tendons, ligaments, and retinacula.

Posterior Leg mm: Superficial Group

  • Includes gastrocnemius, soleus, and plantaris.
  • Description and attachments of each muscle.
  • Relationships between the muscles, tendons and Achilles tendon.
  • Tibial nerve's function relating to the muscles, tendons and nerves in superficial group.

Gastrocnemius m.

  • Origin (medial and lateral heads of femur).
  • Insertion (posterior calcaneus –via Achilles tendon), and functional action (plantarflex)
  • Relations to other posterior leg muscles.

Plantaris M.

  • Plantaris muscle proximal attachments are described.
  • Same origin and insertion as the lateral head of gastrocnemius.

Plantaris M: Soleus M - Attachments and function

  • Origins of plantaris and soleus and insertions/functions including plantar flexion.

Tendocalcaneal bursa

  • Lies between calcaneus and tendo-Achilles.

Deep Posterior Leg mm.

  • Popliteus and muscles of the deep posterior compartment
  • Details of their insertion, functional action, and relations to other muscles.
  • Tibial nerve's role for each muscle.

Deep Posterior Leg mm: Distal Attachments/Actions

  • Tibialis posterior, flexor digitorum longus, and flexor hallucis longus, distal attachments and functional actions.

Tibial Nerve

  • Course through the posterior leg, passing deep to flexor retinaculum.
  • Relationship with superficial and deep muscles of the posterior compartment.

Sural Nerve

  • Formation (joining of medial sural cutaneous nerves and common fibular nerves)
  • Course through the posterior leg
  • Innervates the lateral side of the ankle and foot.

Common Fibular n.

  • Course along the distal tendon of the biceps femoris m., and around the head of the fibula.
  • Nerve splits into superficial and deep branches.

Superficial Fibular n.

  • Travels in the lateral compartment.
  • Innervates the structures in the lateral compartment (muscles).
  • Passes to the dorsum of the foot.

Posterior Tibial A.

  • Travels between superficial and deep posterior compartments.
  • Medial to the ankle, passing under flexor retinaculum.

Fibular A.

  • Travels on the lateral aspect of the posterior compartment.
  • Passes deep to flexor hallucis longus.

Anterior Tibial Artery

  • Enters the anterior compartment after the popliteal artery splits.
  • Travels deep to the extensor retinaculum.
  • Branches into the dorsalis pedis artery.

Compartment Comparison

  • Summarizes the arteries, nerves, and movement associated with anterior, posterior and lateral leg compartments.

Popliteal Region: Neurovascular

  • Provides information about the popliteal region, and the posterior aspect of the leg, including nerves and vessels, and their courses.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Leg Anatomy Lecture Notes PDF
Leg Anatomy PDF

Description

Test your understanding of the terms and conditions regarding class recordings for the leg lecture. This quiz assesses your knowledge of student agreements and expected learning outcomes. Ensure you are familiar with the essential policies related to class recordings.

Use Quizgecko on...
Browser
Browser