extensors of the ankle and toes

Question 1

tibilialis anterior

Answer 1

O: lateral condyle of tibia, lateral surface of tibia, and interosseous membrane
I: medial cuneiform and base of the first metatarsal
F: invert the foot
Dorsiflex the ankle (talocrural joint)

Question 2

extensor digitorum longus

Answer 2

O: lateral condyle of tibia: proximal, anterior shaft of fibula
Interosseous membrane
I: middle and distal phalanges of second through fifth toes
F: Extend the second through fifth toes (metatarsophalangeal and interphalangeal joints)
Dorsiflex the ankle (talocrural joint)
Evert the foot

Question 3

extensor hallucis longus

Answer 3

O: middle, anterior surface of fibula and interosseous membrane
I: distal phalanx of first toe
F: Extend the first toe (metatarsophalangeal and interphalangeal joints)
Dorsiflex the ankle (talocrural joint)
Invert the foot