muscles

Question 1

tibialis anterior

Answer 1

O: lateral tibial surface
I: dorsomedial surface of metatarsal I
Inn: anterior compartment of the leg
F: ankle dorsiflexion and inversion

Question 2

extensor digitorum longus (foot)

Answer 2

O: lateral tibial condyle + medial fibular surface
I: dorsal surface of lateral four phalanges (toes)
Inn: anterior compartment of leg
F: extension of lateral four toes and ankle dorsiflexion

Question 3

extensor hallucis longus

Answer 3

O: medial surface of fibula
I: dorsal surface of hallux (big toe)
Inn: anterior compartment of leg
F: great toe extension and ankle dorsiflexion

Question 4

fibularis longus

Answer 4

O: upper lateral surface and head of fibula
I: plantar surface of metatarsal I
Inn: lateral compartment of leg
F: ankle eversion and plantarflexion + supports arch of the foot

Question 5

fibularis brevis

Answer 5

O: lower lateral surface of fibular shaft
I: lateral aspect of metatarsal V
Inn: lateral compartment of the leg
F: ankle eversion and plantarflexion

Question 6

gastrocnemius (2 heads)

Answer 6

O: medial head: posteromedial femoral condyle
lateral head: postero-lateral femoral condyle
I: posterior calcaneus via calcaneal (achilles) tendon
Inn: posterior compartment of leg
F: ankle plantar flexion and aids in knee flexion

Question 7

soleus

Answer 7

O: soleal line of tibia and posterior fibular head/neck/shaft
I: posterior calcaneus via calcaneal (achilles)
Inn: posterior compartment of leg
F: ankle plantarflexion

Question 8

flexor hallucis longus

Answer 8

O: posterior surface of fibula
I: plantar surface of great toe (hallux)
Inn: posterior compartment of leg
F: flexes great toe and ankle plantarflexion

Question 9

flexor digitorum longus (foot)

Answer 9

O: posterior surface of the tibia
I: plantar surface of lateral four phalanges (toes)
Inn: posterior compartment of the leg
F: flexes lateral four toes and ankle plantarflexion

Question 10

tibialis posterior

Answer 10

O: posterior tibia and fibula (in between FHL and FDL)
I: plantar surface of nearly all tarsal and metatarsal bones
Inn: posterior compartment of leg
F: ankle inversion and plantarflexion and supports the medial arch

Question 11

SOMETHING TO NOTE

Answer 11

• hallucis (toe) is on the medial side while the hallucis muscle originates from the lateral side
• digitorum (toes) on the lateral side, while digitorum muscle originates from the medial side