Muscles of the Lower Extremity

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Questions and Answers

Match the muscle with its origin:

Tibialis Anterior = Lateral surface of shaft of tibia and interosseous membrane Extensor Digitorum Longus = Anterior surface of shaft of fibula Fibularis Tertius = Base of fifth metatarsal bone Extensor Hallucis Longus = Base of distal phalanx of great toe

Match the muscle with its nerve supply:

Tibialis Anterior = Deep fibular nerve Extensor Digitorum Longus = Deep fibular nerve Fibularis Tertius = Deep fibular nerve Extensor Hallucis Longus = Deep fibular nerve

Match the muscle with its insertion:

Tibialis Anterior = Medial cuneiform and base of first metatarsal bone Extensor Digitorum Longus = Extensor expansion of lateral four toes Fibularis Tertius = Base of fifth metatarsal bone Extensor Hallucis Longus = Base of distal phalanx of great toe

Match the action with the appropriate compartment of leg muscles:

Action of Anterior Compartment = Extends toes; extends foot at ankle joint Action of Lateral Compartment = Extends foot at ankle joint; everts foot Action of Posterior Compartment = Plantarflexes foot at ankle joint Signup and view all the answers

Match the muscle to its respective action in the anterior compartment of the thigh:

Sartorius = Flexes, abducts, laterally rotates thigh Iliacus = Flexes thigh on trunk Psoas = Flexes trunk on thigh if thigh is fixed Rectus Femoris = Extension of leg at knee joint Signup and view all the answers

Match the thigh muscle with its nerve supply:

Sartorius = Femoral nerve Iliacus = Lumbar plexus Psoas = Lumbar plexus Pectineus = Femoral nerve (sometimes obturator nerve) Signup and view all the answers

Match the muscle to its insertion point:

Sartorius = Upper medial surface of tibia Iliacus = Lesser trochanter of femur Rectus Femoris = Quadriceps tendon into patella Vastus Lateralis = Tubercle of tibia via ligamentum patellae Signup and view all the answers

Match each quadriceps muscle with its action:

Vastus Medialis = Extension of leg at knee joint; stabilizes patella Vastus Intermedius = Extension of leg at knee joint Vastus Lateralis = Extension of leg at knee joint Rectus Femoris = Extension of leg at knee joint; flexes thigh Signup and view all the answers

Match the anterior compartment muscle to its origin:

Sartorius = Anteroinferior iliac spine Iliacus = Iliac fossa of hip bone Psoas = Transverse processes and bodies of lumbar vertebrae Pectineus = Superior ramus of pubis Signup and view all the answers

Match the muscle to its action in the lateral compartment:

Tensor Fasciae Latae = Abducts and medially rotates thigh Gluteus Medius = Abducts and medially rotates thigh Gluteus Minimus = Abducts and medially rotates thigh Semitendinosus = Flexes leg at knee joint Signup and view all the answers

Match the muscle of the posterior compartment with its action:

Biceps Femoris = Flexes leg at knee joint Semitendinosus = Flexes leg at knee joint Semimembranosus = Flexes leg at knee joint Popliteus = Unlocks knee joint Signup and view all the answers

Match the actions with the corresponding muscles in the anterior compartment:

Sartorius = Flexes and medially rotates leg at knee joint Psoas = Flexes thigh on trunk Iliacus = Flexes the trunk on thigh if fixed Rectus Femoris = Extension of leg at knee joint; flexes thigh Signup and view all the answers

Match each muscle with its corresponding nerve innervation:

Sartorius = Femoral nerve Iliacus = Lumbar plexus Pectineus = Femoral nerve (sometimes obturator nerve) Rectus Femoris = Femoral nerve Signup and view all the answers

Match the following leg muscles to their origin:

Fibularis Longus = Lateral surface of shaft of fibula Fibularis Brevis = Base of fifth metatarsal bone Gastrocnemius = Lateral condyle of femur Soleus = Shafts of tibia and fibula Signup and view all the answers

Match each muscle to its innervation:

Fibularis Longus = Superficial fibular nerve Gastrocneumius = Tibial nerve Popliteus = Tibial nerve Tibialis Posterior = Tibial nerve Signup and view all the answers

Match the following actions to the appropriate muscles in the posterior compartment:

Flexor Digitorum Longus = Plantar flexes foot and flexes toes Flexor Hallucis Longus = Flexes distal phalanx of big toe Tibialis Posterior = Inverts foot and supports medial arch Soleus = Provides main propulsive force in walking Signup and view all the answers

Match the following muscle origins to their function:

Plantar Flexes foot = Gastrocnemius Everts foot = Fibularis Brevis Flexes knee joint = Gastrocnemius Supports arches of foot = Fibularis Longus Signup and view all the answers

Match the muscle with its primary action in the lateral compartment:

Fibularis Longus = Supports lateral longitudinal arch Fibularis Brevis = Everts foot Tibialis Anterior = Dorsiflexion of foot Extensor Digitorum Longus = Extends toes Signup and view all the answers

Match the muscle with its correct insertion:

Fibularis Longus = Base of first metatarsal Fibularis Brevis = Base of fifth metatarsal bone Soleus = Posterior surface of calcaneum Gastrocnemius = Tendo calcaneus into calcaneum Signup and view all the answers

Match the muscle to its role in ankle movement:

Gastrocnemius = Plantar flexion and flexes knee Popliteus = Unlocks knee joint Soleus = Powerful plantar flexor Fibularis Longus = Everts foot Signup and view all the answers

Match the following actions to the correct muscle in the deep group of the posterior compartment:

Flexor Digitorum Longus = Flexes lateral four toes Flexor Hallucis Longus = Flexes big toe Popliteus = Unlocks knee joint by lateral rotation Tibialis Posterior = Supports medial longitudinal arch Signup and view all the answers

Study Notes