Other Foot Muscles

Question 1

Give actions, origins, insertions and nerve innervation for extensor digitorum brevis

Answer 1

A
Extend the second through fourth toes (metatarsophalangeal and interphalangeal joints)
O
Dorsal surface of calcaneus
I
Second through fourth toes via the extensor digitorum longus tendons
N
Deep fibular L4, 5, S1

Question 2

Give actions, origins, insertions and nerve innervation for abductor hallucis

Answer 2

A
Abduct the first toe (metatarsophalangeal joint) Assist to flex the first toe (metatarsophalangeal joint)
O
Medial process of calcaneus and plantar aponeurosis
I
Proximal phalanx of first toe (medial surface) and medial sesamoid bone
Tibial L4, 5, S

Question 3

Give actions, origins, insertions and nerve innervation for abductor digiti minimi

Answer 3

Abductor Digiti Minimi
A
Flex the fifth toe
Assist to abduct the fifth toe (metatarsophalangeal joint)
O
Lateral process of calcaneus and plantar aponeurosis
I
Proximal phalanx of fifth toe (lateral surface)
N
Tibial S1, 2

Question 4

Give actions, origins, insertions and nerve innervation for extensor hallucis brevis

Answer 4

Extensor Hallucis Brevis
A
Extend the first toe (metatarsophalangeal joint)
O
Dorsal surface of calcaneus
I
Proximal phalanx of first toe
N
Deep fibular L4, 5, S1

Question 5

Give actions, origins, insertions and nerve innervation for Flexor hallucis brevis

Answer 5

Flexor Hallucis Brevis
A
Flex the first toe (metatarsophalangeal joint)
O
Plantar surfaces of cuboid and lateral cuneiform
I
Medial and lateral surfaces of base of proximal phalanx of first toe
N
Tibial L4, 5, S1

Question 6

Give actions, origins, insertions and nerve innervation for adductor hallucis

Answer 6

Adductor Hallucis
A
Adduct the first toe
Assist to maintain transverse arch of foot
Assist to flex the first toe
O
Oblique head: Bases of second through fourth metatarsals
Transverse head: Plantar ligament of third through fifth metatarsophalangeal joints
I
Lateral surface of base of proximal phalanx of first toe
N
Tibial S1, 2

Question 7

Give actions, origins, insertions and nerve innervation for Quadratus plantae

Answer 7

Quadratus Plantae
A
Assist flexor digitorum longus to flex 2nd–5th toes
O
Medial and lateral sides of plantar surface of calcaneus I I
Posterior, lateral aspect of flexor digitorum longus tendon
N
Tibial S1, 2