Posterior Leg and Plantar Foot Flashcards
What are the two parts of gastrocnemius muscle?
medial head and lateral head
Where does the medial head of gastrocnemius originate?
medial condyle of femur
Where does the lateral head of gastrocnemius originate?
lateral condyle of femur
Where do both heads of gastrocnemius insert?
calcaneus via the achilles (calcaneal) tendon
What innervates gastrocnemius?
Tibial N.
What are the actions of gastrocnemius?
flexion of knee
plantarflexion of foot
Where does plantaris originate?
lateral condyle of femur and joint capsule
Where does plantaris insert?
calcaneus via the achilles (calcaneal) tendon
What innervates plantaris?
Tibial N.
What are the actions of plantaris?
weakly flexes the knee
plantarflexion
Where does the soleus muscle originate?
solaeal line of tibia, interosseous membrane and fibula
Where does the soleus muscle insert?
Calcaneus via the Achilles (calcaneal) tendon
What innervates the soleus muscle?
Tibial N.
What are the actions of the soleus muscle?
Plantarflexion of foot
Where does the popliteus muscle orignate?
lateral femoral condyle
Where does the popliteus muscle insert?
Tibia
What innervates popliteus?
Tibial N.
What are the actions of popliteus?
Weak flexion of the knee
Medial rotation of the tibia or lateral rotation of femur (unlocking the knee)
Where does flexor hallucis longus originate?
fibula, interosseous membrane and tibia
Where does flexor hallucis longus insert?
distal phalanx of the great toe
What innervates flexor hallucis longus?
Tibial N.
What are the actions of flexor hallucis longus?
flexion of the great toe
plantarflexion of the foot
inversion of the foot
Where does flexor digitorum longus orginate?
Fibula, interosseous membrane and tibia
Where does flexor digitorum longus insert?
distal phalanx of digits 2-5
What innervates flexor digitorum longus?
Tibial N.
What are the actions of flexor digitorum longus?
Flexion of Digits 2-5
Plantarflexion of foot
inversion of foot
Where does tibialis posterior insert?
navicular and medial cuneiform
Where does tibialis posterior originate?
fibula, interosseous membrane and tibia
What innervates tibialis posterior?
Tibial N.
What are the actions of tibialis posterior?
Plantarflexion of foot
inversion of foot
dynamic support of arches
