Muscles of Foot

Question 1

abductor Hallucis innervation

Answer 1

medial plantar nerve (S2, S3)

Question 2

abductor Hallucis muscle action

Answer 2

A: abducts and flexes 1st digit (great toe, hallux)

Question 3

Flexor digitorum Brevis innervation

Answer 3

medial plantar nerve (S2, S3)

Question 4

Abductor Digiti Minimi innervation

Answer 4

lateral plantar nerve (S2, S3)

Question 5

abductor digiti minimi muscle action

Answer 5

abducts and flexes 5th digit

Question 6

flexor hallucis brevis innervation

Answer 6

medial plantar nerve (S2, S3)

Question 7

flexor hallucis brevis action

Answer 7

flexes proximal phalanx of 1st digit

Question 8

extensor digitorum brevis action

Answer 8

Action: Aids the extensor digitorum longus in extending the four medial toes at the metatarsophalangeal and interphalangeal joints

Question 9

extensor hallucis brevis innervation

Answer 9

Deep Fibular Nerve (L5 or S1, or both)

Question 10

extensor hallucis brevis action

Answer 10

Aids the extensor hallucis longus in extending the great toe at the metatarsophalangeal joint

Question 11

adductor hallucis innervation

Answer 11

deep branch of lateral plantar nerve (S2, S3)

Question 12

adductor hallucis action

Answer 12

Traditionally said to adduct 1st digit; assists in transverse arch of foot by metatarsals medially

Question 13

flexor digiti minimi brevis innervation

Answer 13

superficial branch of lateral plantar nerve (S2, S3)

Question 14

flexor digiti minimi brevis action

Answer 14

flexes proximal phalanx of 5th digit

Question 15

extensor hallucis brevis innervation

Answer 15

Deep Fibular Nerve (L5 or S1, or both)

Question 16

extensor hallucis brevis action

Answer 16

Aids the extensor hallucis longus in extending the great toe at the metatarsophalangeal joint

Question 17

dorsal interossei innervation

Answer 17

Lateral Plantar Nerve (S2, S3)

Question 18

dorsal interossei action

Answer 18

Abduct digits 2-4 and flex metatarsophalangeal joints

Question 19

quadratus plantae innervation

Answer 19

lateral plantar nerve (S2, S3)

Question 20

quadratus plantae action

Answer 20

Assists flexor digitorum longus in flexing lateral four digits

Question 21

lumbricals muscle innervation

Answer 21

Medial one: medial plantar nerve (S2, S3)

Lateral three: lateral plantar nerve (S2, S3)

Question 22

lumbricals muscle action

Answer 22

Flex proximal phalanges; extend middle and distal phalanges of lateral four digits

Question 23

plantar interossei innervation

Answer 23

Lateral Plantar Nerve (S2, S3)

Question 24

plantar interossei action

Answer 24

Adduct digits 3-5 and flex metatarsophalangeal joints

Question 25

extensor digitorum brevis innervation

Answer 25

Deep fibular nerve (L4-S1)