kin 365 exam 3 (ankle and foot)

gastrocnemius medial head origin

posterior surface of the medial femoral condyle

gastrocnemius lateral head origin

posterior surface of lateral femoral condyle

gastrocnemius insertion

posterior surface of calcaneus

gastrocnemius action

plantar flexion
knee flexion

the gastrocnemius is more effective as a knee flexor if the ankle is ___

dorsiflexed

soleus origin

posterior surface of proximal fibula and proximal 2/3 of posterior tibial surface

soleus insertion

posterior surface of calcaneus

soleus action

plantar flexion

tibialis anterior origin

upper 2/3 of lateral surface of tibia

tibialis anterior insertion

inner surface of medial cuneiform and base of first metatarsal

tibialis anterior action

dorsiflexion
inversion

tibialis posterior origin

posterior surface of upper half of interosseus membrane and adjacent surface of tibia and fibula

tibialis posterior insertion

inferior surface of navicular, cuneiform and suboid bones and base of second, third, and fourth metatarsal

tibialis posterior action

plantar flexion
inversion