Lower leg Flashcards
What 4 muscles make up the anterior compartment of the leg + also dorsiflex the ankle
- tibialis anterior
- extensor digitorum longus
- extensor hallucis longus
- fibularis tertius
tibialis anterior
o = tibia, interosseus membrane
i = medial cunieform, 1st metatarsal
a = dorsiflexion, inversion
n = deep fibular
extensor digitorum longus
o = lateral tibia, superior medial fibula
i = toes 2-5
a = dorsiflexion, extend toes 2-5
n = deep fibular
extensor hallucis longus
o = fibula, interosseus membrane
i = base of hallux
a = dorsiflex ankle/extend hallux
n = deep fibular
fibularis tertius
o = fibula + interosseus membrane
i = 5th metatarsal
a = dorsiflex ankle, evert foot
n = deep fibular
what 5 muscles originate on the interosseus membrane
fibularis tertius, extensor hallucis longus, flexor hallucis longus, tibialis anterior, tibialis posterior
what are the muscles that make up the posterior compartment of the leg
Superficial
- gastrocnemius
- soleus
Deep
- tibialis posterior
- flexor digitorum longus
- flexor hallucis longus
gastrocnemius
o = medial/lateral condyles of femur
i = calcaneus via achilles
a = plantar flexion, knee flexion
n = tibial nerve
soleus
o = tibia + fibula
i = calcaneus via achilles
a = plantar flexion
n = tibial nerve
tibialis posterior
o = tibia, fibula + interosseus membrane
i = navicular, cuneiforms, cuboid, metatarsals
a = plantar flexion, inversion, arch support
n = tibial nerve
flexor digitorum longus
o = posterior tibia
i = lateral 4 toes
a = flex toes 2-5, plantarflexion, arch support
n = tibial
flexor hallucis longus
o = fibula, interosseus membrane
i = hallux
a = flex hallux, arch support
n = tibial
what muscles plantarflex the ankle (4)
- gastrocnemius
- soleus
- tibialis posterior
- flexor digitorum longus
what muscles form arch support for the foot (3)
- flexor digitorum longus
- flexor hallucis longus
- tibialis posterior
what muscles make up the lateral compartment of the lower leg
- fibularis longus
- fibularis brevis
