Intrinsic Muscles of the Foot- Dorsum

Question 1

Extensor Digitorum Brevis

Answer 1

origin: calcaneus
insertion: extensor expansion of digits 2-4
innervation: deep fibular N.
action: eversion of the foot, assist in plantarflexion, support of arches

Question 2

Extensor Hallucis Brevis

Answer 2

origin: calcaneus
insertion: base of proximal phalanx of digit 1
innervation: deep fibular N.
action: extension of the great toe