Leg/popliteal fossa
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44 Terms
what are the 4 compartments of the lower leg?
Anterior, Lateral, Superficial posterior, deep posterior
Where does the tibialis anterior originate?
lateral epicondyle and superior ½ of lateral tibia
where does the tibialis anterior insert?
inferior medial cuneiform, base of first metatarsal
what is the action of the tibialis anterior?
dorsiflexion, inversion
what is innervated by the deep fibular nerve?
tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius externsor digitorum brevis, extensor hallucis brevis
what is the origin of the extensor digitorum longus?
lateral condyle of tibia, superior ¾ of fibula
what is the insertion of the extensor digitorum longus?
middle/distal phalanges of digits 2-5
what is the action of extensor digitorum longus?
dorsiflexion, digit extension
what is the origin of the extensor hallucis longus?
middle part of anterior fibula, interosseous membrane
what is the insertion of extensor hallucis longus?
dorsal distal phalanx of great toe
what is the action of the extensor hallucis longus?
extend great toe, dorsiflexion
what is the origin of the fibularis tertius?
distal 1/3 of anterior surface of fibula
what is the insertion of the fibularis tertius?
dorsum of 5th metatarsal
what is the action of the fibularis tertius?
dorsiflexion, eversion
what 4 muscles make up the anterior compartment of the lower leg?
tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius
what 2 muscles make up the lateral compartment of the lower leg?
fibularis longus, fibularis brevis
what is the origin of the fibularis longus?
head and proximal 2/3 of lateral fibula
what is the insertion of the fibularis longus?
plantar aspect of the first metatarsal, medial cuneiform
what is the action of the fibularis longus?
eversion, weak plantarflexion
what is innervated by the superficial fibular nerve?
fibularis longus, fibularis brevis
what is the origin of the gastrocnemius?
posterior aspect of medial and lateral femoral condyles
what is the insertion of the gastrocnemius?
calcaneal tuberosity via calcaneal tendon
what is the action of the gastrocnemius?
plantar flexion, knee flexion
what muscles are innervated by the tibial nerve?
gastrocnemius, soleus, plantaris, popliteus, flexor digitorum longus, flexor hallicus longus, tibialis posterior
what is the origin of the soleus?
soleal line of tibia, fibular head
what is the insertion of the soleus?
calcaneal tuberosity via calcaneal tendon
what is the action of the soleus?
plantar flexion
what is the action of the plantaris muscle?
plantar flexion, knee flexion
what is the origin of the plantaris?
inferior end of lateral supracondylar line of femur
what is the insertion of the plantaris?
calcaneal tuberosity via calcaneal tendon
what is the origin of the popliteus?
posterior lateral condyle, lateral meniscus
what is the insertion of the popliteus?
posterior proximal tibia superior to soleal line
what is the action of the popliteus?
unlocks the knee via flexion and medial rotation
what is the origin of the flexor digitorum longus?
medial posterior tibia inferior to soleal line
what is the insertion of the flexor digitorum longus
distal phalanges of digits 2-5
what is the action of flexor digitorum longus?
plantar flexion, inversion, flex digits
what is the origin of the flexor hallucis longus?
distal 2/3 of posterior fibula, inferior interosseous membrane
what is the insertion of the flexor hallucis longus?
distal phalanx of great toe
what is the action of the flexor hallucis longus?
plantar flexion, inversion, great toe flexion
what is the origin of the tibialis posterior?
posterior tibia inferior to soleal line, posterior surface of fibula, interosseous membrane
what is the insertion of the tibialis posterior?
tuberosity of navicular, cuneiform, cuboid, sustentaculum tali, bases of 2-4 metatarsals
what is the action of tibialis posterior?
plantar flexion, inversion
what 3 muscles make up the superficial posterior compartment?
gastrocnemius, soleus, plantaris
what 4 muscles make up the deep posterior compartment?
popliteus, flexor digitorum longus, flexor hallucis longus, tibialis posterior