ES 553- ankle and lower leg muscles (AOIN)

extensor digitorum longus

extensor hallucis longus

flexor digitorum longus

flexor hallucis longus

soleus

tibialis anterior

tibialis posterior

peroneus (fibularis) brevis

peroneus (fibularis) longus

gastrocnemius

plantaris

extensor digitorum longus origin and insertion

O: lateral condyle of tibia, proximal anterior shaft of fibula, interosseous membrane

I:middle and distal phalanges of 2nd-5th toes

extensor hallucis longus origin and insertion

O: middle anterior surface of fibula, interosseous membrane

I: distal phalanx of 1st toe

flexor digitorum longus origin and insertion

O: middle, posterior surface of tibia

I: distal phalanges of 2nd-5th toes

flexor hallucis longus origin and insertion

O: middle half of posterior fibula

I: distal phalanx of first toe

soleus origin and insertion

O: soleal line, proximal posterior surface of tibia, posterior aspect of head of fibula

I: calcaneus via calcaneal tendon

tibialis anterior origin and insertion

O: lateral condyle of tibia , proximal lateral surface of tibia, interosseous membrane

I: medial cuneiform, base of 1st metatarsal

tibialis posterior origin and insertion

O: proximal posterior shafts of tibia and fibula, interosseous membrane

I: all five tarsal bones, bases of 2nd-4th metatarsals

peroneus brevis origin and insertion

O: distal two thirds of lateral fibula

I: tuberosity of 5th metatarsal

peroneus longus origin and insertion

O: head of fibula, proximal two thirds of lateral fibula

I: base of 1st metatarsal, medial cuneiform

gastrocnemius origin and insertion

O: condyles of femur, posterior surfaces

I: calcaneus via calcaneal tendon

plantaris origin and insertion

O: lateral supracondylar line of femur

I: calcaneus via calcaneal tendon

extensor digitorum longus action

-extend the 2nd-5th toes (MTP and IP joints)

-dorsiflex the ankle (talocrural joint)

-evert the foot

extensor hallucis longus action

-extend the 1st toe (MTP and IP joints)

-dorsiflex the ankle (talocrural joint)

-invert the foot

flexor digitorum longus action

-flex the 2nd-5th toes (MTP and IP joints)

-weak plantar flexion of ankle (talocrural joint)

-invert the foot

flexor hallucis longus action

-flex the 1st toe (MTP and IP joints)

-weak plantar flexion of ankle (talocrural joint)

-invert the foot

soleus action

-plantar flex the ankle (talocrural joint)

tibialis anterior action

-invert the foot

-dorsiflex the ankle (talocrural joint)

tibialis posterior action

-invert the foot

-plantar flex the ankle (talocrural joint)

peroneus brevis action

-evert the foot

-assist to plantar flex the ankle (talocrural joint)

peroneus longus action

-evert the foot

-assist to plantar flex the ankle (talocrural joint)

gastrocnemius action

-flex the knee (tibiofemoral joint)

-plantar flex the ankle (talocrural joint)

plantaris action

-weak plantar flexion of the ankle (talocrural joint)

-weak flexion of the knee (tibiofemoral joint)

extensor digitorum longus nerve innervation

peroneal n.

extensor hallucis longus nerve innervation

deep peroneal n.

flexor digitorum longus nerve innervation

tibial n.

flexor hallucis longus nerve innervation

tibial n.

soleus nerve innervation

tibial n.

tibialis anterior nerve innervation

deep peroneal n.

tibialis posterior nerve innervation

tibial n.

peroneus brevis nerve innervation

superficial peroneal n.

peroneus longus nerve innervation

superficial peroneal n.

gastrocnemius nerve innervation

tibial n.

plantaris nerve innervation

tibial n.