Dorsal/Plantar Foot

Question 1

Extensor Digitorum Brevis

Answer 1

Inner: deep peroneal nerve
Origin: distal lateral surface of the calcaneus
Inser: lateral sides of the tendons of extensor digitorum longus of the 2nd, 3rd, and 4th toes
Action: dorsiflexion, or extension, of toes 2-4

Question 2

Extensor Hallucis Brevis

Answer 2

Inner: deep peroneal nerve
Origin: distal medial surface of the calcaneus
Inser: dorsum of base of proximal phalanx of the great toe
Action: dorsiflexion, or extension, of the great toe

Question 3

Abductor Hallucis

Answer 3

Inner: medial plantar nerve
Origin: medial tuberosity of the calcaneus; plantar aponeurosis
Inser: medial side of the base of the proximal phalanx of the great toe
Action: abduction of the great toe from the midline of the foot

Question 4

Flexor Digitorum Brevis

Answer 4

Inner: medial plantar nerve
Origin: medial tuberosity of the calcaneus; plantar aponeurosis
Inser: plantar surface of middle phalanges of lesser toes
Action: plantar flexes, or flexes, the lesser toes

Question 5

Abductor Digiti Minimi

Answer 5

Inner: lateral plantar nerve
Origin: lateral tuberosity of the calcaneus; plantar aponeurosis
Inser: lateral side of the base of the proximal phalanx of the 5th toe
Action: abduction of the 5th toe from the midline of the foot

Question 6

Dorsal Interossei

Answer 6

Inner: lateral plantar nerve
Origin: adjacent sides of the metatarsals
Inser: both sides of the proximal phalanges of the 2nd toe; lateral side
of the proximal phalanges of the 3rd and 4th toes
Action: abduction of the toes