Posterior Leg and Ankle Flashcards
gastrocnemius insertion
calcaneal tuberosity via the calcaneal tendon
gastrocnemius innervation
tibial nerve s1-s2
gastrocnemius action
talocrural joint: plantar flexion, knee joint: flexion
soleus origin
fibular head, neck, posterior surface, tibia soleal line via a tendinous arch
soleus insertion
calcaneal tuberosity via calcaneal tendon
soleus innervation
tibial nerve s1-s2
soleus action
talocrural joint: plantar flexion
plantaris origin
femur (lateral epicondyle, proximal to lateral head of gastrocnemius)
plantaris insertion
calcaneal tuberosity
plantaris innervation
tibial nerve s1-s2
plantaris action
negligible; may prevent compression of posterior leg musculature during knee flexion
flexor digitorum longus origin
tibia, middle third of posterior surface
flexor digitorum longus insertion
2-5 distal phalanges bases
flexor digitorum longus innervation
tibial nerve l5-s2
flexor digitorum longus action
talocrural joint: plantar flexion, subtalar joint: inversion, MTP and IP joints of 2-5 toes: plantar flexion
flexor hallucis longus origin
fibula, distal 2/3 posterior surface, adjacent interosseous membrane
flexor hallucis longus insertion
1st distal phalanx, base
flexor hallucis longus innervation
tibial nerve l5-s2
flexor hallucis longus action
talocrural joint: plantar flexion, subtalar joint: inversion, MTP and IP joints of 1st toe: plantar flexion, supports medial longitudinal arch
tibialis posterior origin
interosseous membrane, adjacent borders of tibia and fibula
tibialis posterior insertion
navicular tuberosity, medial/intermediate/lateral cuneiforms, base of 2-4 metatarsals
tibialis posterior innervation
tibial nerve l4-l5
tibialis posterior action
talocrural joint: plantar flexion, subtalar joint: inversion, supports longitudinal and transverse arches
gastrocnemius origin?
medial and lateral epicondyles of femur
