Anterior, Posterior and lateral leg Muscles Flashcards
Tibialis anterior (anterior)
Origin - Lateral surface of tibia
Insertion - medial cuniform and base of 1st metatarsal
Innervation - deep peroneal nerve
Action - Dorsiflexion and inversion of foot
Extensor digitorum of foot (anterior)
Origin - Lateral condyle of the tivia and medial surface of the fibula
Insertion - digits 2-5
Innervation - deep peroneal nerve
Action - extension of lateral 4 digits and dorsiflexion of foot
Extensor hallucis longus (anterior)
Origin - Medial surface of the fibula
Insertion - distal phaanx of 1st digit
Innervation - deep peroneal nerve
Action - extension of 1st digit and dorsiflexion of foot
Fibularis tertius (peroneus tertius) (anterior)
Origin - Medial surface of fibula
Insertion - metatarsal V
Innervation - deep peroneal nerve
Action - eversion and dorsiflexion
Gastrocnemius Lateral and medial (posterior)
Origins
Lateral head - lateral femoral condyle
Medial head - medial femoral condyle
Insertion - combine with soleus on calcaneal tendon onto calcaneus
Innervation - tibial nerve
Action - plantarfelxio at the ankle and flexion of the knee
Soleus
Origin - Soleal line of tibia
Insertion - calcaneal tendon
Innervation - tibial nerve
Action - plantarflexion
Plantaris (can be mistaken for nerve)
Origin - Lateral supracondylar line of femur
Insertion - passes between gastrocnemius and soleus to join calcaneal tendon
Innervation - tibial nerve
Action - plantarflexes at ankle and flexes the knee
Politeus
Origin - Posterior surface of the tibia
Insertion - lateral condyle of the femur
Innervation - tibial nerve
Action - extenral rotation of the femus on the tibia unlocking knee joint allowing flexion
Tibialis posterior
Origin - Interosseous membrane and posterior surfaces of tibia and fibula
Insertion - plantar surface of the medial tarsal bones
Innervation - tibial nerve
Action - inverts and plantarflexes
Flexor digitorum longus
Origin - Medial surface of tibia
Insertion - plantar surfaces of last 4 digits
Innervation - tibial nerve
Action - flexes tje last 4 digits
Flexor hallucis longus
Origin - Posterior surface of the tibia
Insertion - plantar surface of the phalanx of last digit
Innervation - tibial nerve
Action - flexes the big toe
Fibularis longus
Origin - Superior and lateral surface of the fibula and lateral tibial condyle
Insertion - medial cuneiform and base of 1st metatarsal
Innervation - superficial peroneal nerve
Action - eversion and plantarflexion
Fibularis brevis
Origin - Inferior and lateral surface of the fibula
Insertion - metatarsal 5
Innervation - superficial peroneal nerve
Action - eversion of foot
