lower leg AOIN

Question 1

Gastrocnemius

Answer 1

A: flex the knee, plantarflex the ankle
O: condyles of the femur, posterior surfaces
I: calcaneus via calcaneal tendon
N: tibial S1,2

Question 2

Soleus

Answer 2

A: plantarflex the ankle
O: soleal line, proximal, posterior surface of tibia and posterior aspect of head of fibula
I: calcaneus via calcaneal tendon
N: tibial L5,S1,2

Question 3

Plantaris

Answer 3

A: weak plantarflexion of ankle and weak flexion of knee
O: lateral supracondylar line of femur
I: calcaneus via calcaneal tendon
N: tibial L4,5,S1,2

Question 4

Popliteus

Answer 4

A: flex and medially rotate the flexed knee
O: lateral condyle of the femur
I: proximal, posterior aspect of tibia
N: tibial L4,5,S1

Question 5

Peroneus Longus

Answer 5

A: evert the foot, assist to plantarflex the ankle
O: head of fibula and proximal 2/3 of lateral fibula
I: base of first MT and medial cuneiform
N: superficial peroneal L4,5,S1

Question 6

Peroneus Brevis

Answer 6

A: evert foot, assist to plantarflex ankle
O: distal 2/3 of lateral fibula
I: tuberosity of 5th MT
N: superficial peroneal L4,5,S1

Question 7

Tibialis Anterior

Answer 7

A: invert foot, dorsiflex ankle
O: lateral condyle of tibia; proximal, ;ateral surface of tibia and IM
I: medial cuneiform and base of first MT
N: deep peroneal L4,5,S1

Question 8

Extensor Digitorum Longus

Answer 8

A: extend 2-5 toes at MTP and IP, dorsiflex ankle, evert foot
O: lateral condyle of tibia; proximal anterior shaft of fibula and IM
I: middle and distal phalanges of 2-5
N: deep peroneal L4,5,S1

Question 9

Extensor Hallucis Longus

Answer 9

A: extend 1st toe at MTP and IP, dorsiflex ankle, invert foot
O: middle, anterior surface of fibula and IM
I: distal phalanx of first toe
N: deep peroneal L4,5,S1

Question 10

Fibularis Tertius

Answer 10

A: dorsiflexion and eversion of foot
O: distal 1/3 of anterior surface of fibula
I: dorsal base of 5th MT
N: deep fibular nerve

Question 11

tibialis posterior

Answer 11

A: invert foot and plantarflex ankle
O: proximal, posterior shafts of tibia and fibula; and IM
I: all 5 tarsals and bases of 2-4 MT
N: tibial L4,5,S1

Question 12

Flexor Digitorum Longus

Answer 12

A: flex 2-5 toes at MTP and IP, weak plantarflexion of ankle, invert foot
O: middle, posterior surface of tibia
I: distal phalanges of 2-5 toes
N: tibial L5,S1,2

Question 13

Flexor Hallucis Longus

Answer 13

A; flex 1st toe at MTP and IP, weak plantarflexion of ankle, invert foot
O: middle half of posterior fibula
I: distal phalanx of first toe
N: tibial L5,S1,2