Intrinsic muscles of foot

Question 1

Origin of abductor hallucis?

Answer 1

Medial tubercle of calcaneus and plantar aponeurosis

Question 2

Insertion of abductor hallucis?

Answer 2

Medial side of proximal phalanx of great toe with tendon of flexor hallucis brevis

Question 3

Action of abductor hallucis?

Answer 3

Abducts and flexes great toe at metatarsophalangeal joint

Question 4

Innervation of abductor hallucis?

Answer 4

Medial plantar nerve (S1-S3)

Question 5

Origin of flexor digitorum brevis?

Answer 5

Medial tubercle of calcaneus and plantar aponeurosis

Question 6

Insertion of flexor digitorum brevis?

Answer 6

Plantar surface of base of middle phalanges II-V

Question 7

Action of flexor digitorum brevis?

Answer 7

Flexes toes II-V at proximal interphalangeal joints and at metatarsophalangeal joints

Question 8

Innervation of flexor digitorum brevis?

Answer 8

Medial plantar nerve (S1-S3)

Question 9

Origin of abductor digiti minimi?

Answer 9

Medial and lateral tubercles of the calcaneus

Question 10

Insertion of abductor digiti minimi?

Answer 10

Lateral aspect of proximal phalanx of 5th digit

Question 11

Action of abductor digiti minimi?

Answer 11

Abducts and flexes little toe at metatarsophalangeal joint

Question 12

Innervation of abductor digiti minimi?

Answer 12

Lateral plantar nerve (S1-S3)

Question 13

Origin of flexor accessorius (quadratus plantae)?

Answer 13

Medial and lateral tubercles of the calcaneus

Question 14

Action of quadratus plantae?

Answer 14

Assists the flexor digitorum longus in flexion of the II-V digits of phalanges at interphalangeal and metatarsophalangeal joints

Question 15

Insertion of quadratus plantae?

Answer 15

Tendon of flexor digitorum longus

Question 16

Innervation of quadratus plantae?

Answer 16

Lateral plantar nerve (S2-S3)

Question 17

Origin of lumbricals?

Answer 17

From tendons of the FDL: First lumbrical originates from the medial aspect of the tendon inserting on the second toe, the following three lumbricals originate on adjacent sides of the tendons

Question 18

Insertion of lumbricals?

Answer 18

Medial side extensor hood and base proximal phalanx of lateral 4 toes

Question 19

Action of lumbricals?

Answer 19

Flexes toes II-V at metatarsophalangeal joints and extends toes II-V at interphalangeal joints

Question 20

Innervation of lumbricals?

Answer 20

First lumbrical is supplied by medial plantar nerve (S1-S2) and the other three are supplied by the lateral plantar nerve (S2-S3)

Question 21

Origin of adductor hallucis?

Answer 21

Oblique head: Plantar surfaces of metatarsals II-IV
Transverse head: Plantar surface of the lateral three metatarsophalangeal joints and their ligaments

Question 22

Insertion of adductor hallucis?

Answer 22

Lateral side of the proximal phalanx of great toe

Question 23

Action of adductor hallucis?

Answer 23

Adducts the great toe at metatarsophalangeal joint

Question 24

Innervation of adductor hallucis?

Answer 24

Lateral plantar nerve (S2-S3)

Question 25

Origin of flexor digiti minimi brevis?

Answer 25

Plantar aspect of 5th metatarsal and tendon of peroneus longus

Question 26

Insertion of flexor digiti minimi brevis?

Answer 26

Lateral side of the proximal phalanx of little toe

Question 27

Action of flexor digiti minimi brevis?

Answer 27

Flexes little toe at metatarsophalangeal joint

Question 28

Innervation of flexor digiti minimi brevis?

Answer 28

Lateral plantar nerve (S2-S3)

Question 29

Origin of dorsal interossei?

Answer 29

Adjacent side of all metatarsals

Question 30

Insertion of dorsal interossei?

Answer 30

Proximal phalanges: both sides of toe II and lateral side of toes III and IV

Question 31

Action of dorsal interossei?

Answer 31

Abducts and flexes toes II-IV at metatarsophalangeal joints

Question 32

Innervation of dorsal interossei?

Answer 32

Lateral plantar nerve (S2-S3)

Question 33

Origin of plantar interossei?

Answer 33

Plantar surface of medial aspects of metatarsals III-V

Question 34

Insertion of plantar interossei?

Answer 34

Medial surface of proximal phalanges III-V

Question 35

Action of plantar interossei?

Answer 35

Adduction and flexion of toes at proximal metatarsophalangeal joints and extend toes at interphalangeal joints

Question 36

Innervation of plantar interossei?

Answer 36

Lateral plantar nerve (S2-S3)

Question 37

Origin of flexor hallucis brevis?

Answer 37

Medial aspect of plantar side cuboid and lateral cuneiform

Question 38

Insertion of flexor hallucis brevis?

Answer 38

Medial and lateral sides of proximal phalanx of great toe via tendon containing sesamoid bone

Question 39

Action of flexor hallucis brevis?

Answer 39

Flexes the great toe at metatarsophalangeal joint

Question 40

Innervation of flexor hallucis brevis?

Answer 40

Medial plantar nerve (S1-S2)