Muscles of the Feet

Question 1

Extensor Digitorum Brevis

Answer 1

O : Dorsal surface of the calcaneus
I : Lateral side of the extensor digitorum longus muscle of toes 2-4 via the dorsal digital expansion into the middle and distal phalanges
A : Extend toes 2-4 at the metatarsophalangeal, proximal interphalangeal and distal interphalangeal joints

Question 2

Extensor Hallucis Brevis

Answer 2

O : Dorsal surface of the calcaneus
I : Dorsal surface of the base of the proximal phalanx of the 1st toe
A : Extends the 1st toe at the metatarsophalangeal joint

Question 3

Abductor Hallucis

Answer 3

O : Tuberosity of the calcaneus, flexor retinaculum and plantar aponeurosis
I : Proximal phalanx of the 1st toe
A : Extends the 1st toe at the metatarsophalangeal joint

Question 4

Abductor Digiti Minimi Pedis

Answer 4

O : Tuberosity of calcaneus and plantar aponeurosis
I : Lateral plantar side of the base of the proximal phalanx of the 5th
A : Abducts the 5th toe at the metatarsophalangeal joint

Question 5

Flexor Digitorum Brevis

Answer 5

O : Tuberosity of calcaneus and the plantar aponeurosis
I : Medial and lateral sides of the middle phalanges of toes 2-5
A : Flex middle phalanges of toes 2-5