Intrinsic muscles of foot

Question 1

Origin of flexor digitorum brevis?

Answer 1

Medial surface of the calcaneal tuberosity, plantar aponeurosis and intermuscular septum

Question 2

Insertion of flexor digitorum brevis?

Answer 2

Bases of middle phalanges of digits 2-5

Question 3

Action of flexor digitorum brevis?

Answer 3

Flexion at metatarsophalangeal joints 2-5, supports longitudinal arch of foot

Question 4

Innervation of flexor digitorum brevis?

Answer 4

Medial plantar nerve (S1-S3)

Question 5

Origin of abductor digiti minimi?

Answer 5

Medial and lateral sides of the calcaneal tuberosity, plantar aponeurosis

Question 6

Insertion of abductor digiti minimi?

Answer 6

Base of lateral surface of proximal phalanx of digit 5, 5th metatarsal

Question 7

Action of abductor digiti minimi?

Answer 7

Abduction + flexion at metatarsophalangeal joint 5, supports longitudinal arch of foot

Question 8

Innervation of abductor digiti minimi?

Answer 8

Lateral plantar nerve (S1-S3)

Question 9

Origin of abductor hallucis?

Answer 9

Medial process of calcaneal tuberosity, flexor retinaculum, plantar aponeurosis

Question 10

Insertion of abductor hallucis?

Answer 10

Base of proximal phalanx of great toe

Question 11

Action of abductor hallucis?

Answer 11

Abduction + flexion of metatarsophalangeal joint 1, supports the longitudinal arch of foot

Question 12

Innervation of abductor hallucis?

Answer 12

Medial plantar nerve (S1-S3)

Question 13

Origin of the four lumbricals?

Answer 13

Tendons of flexor digitorum longus

Question 14

Insertion of the four lumbricals?

Answer 14

Medial bases of proximal phalanges and extensor expansion of digits 2-5

Question 15

Action of the four lumbricals?

Answer 15

Flexion + adduction of metatarsophalangeal joints 2-5, extension at interphalangeal joints 2-5

Question 16

Innervation of the four lumbricals?

Answer 16

Lumbrical 1: Medial plantar nerve (S2-S3), lumbricals 2-4: Lateral plantar nerve (L2-L3)

Question 17

Origin of quadratus plantae?

Answer 17

Inferomedial surface of the calcaneus, lateral surface of calcaneal tuberosity

Question 18

Insertion of quadratus plantae?

Answer 18

Tendon of flexor digitorum longus

Question 19

Action of quadratus plantae?

Answer 19

Assists the flexor digitorum longus in flexion of the toes

Question 20

Innervation of quadratus plantae?

Answer 20

Lateral plantar nerve (S1-S3)

Question 21

Origin of flexor hallucis brevis?

Answer 21

Medial cuneiform bone, lateral cuneiform bone, cuboid bone, medial side of the first metatarsal bone, plantar calcaneocuboid ligament

Question 22

Insertion of flexor hallucis brevis?

Answer 22

Lateral and medial aspects of base of proximal phalanx of great toe

Question 23

Action of flexor hallucis brevis?

Answer 23

Flexion at metatarsophalangeal joint 1, supports longitudinal arch of foot

Question 24

Innervation of flexor hallucis brevis?

Answer 24

Medial plantar nerve (S1-S2)

Question 25

Origin of flexor digiti minimi brevis?

Answer 25

Base of 5th metatarsal, long plantar ligament

Question 26

Insertion of flexor digiti minimi brevis?

Answer 26

Base of proximal 5th phalanx

Question 27

Action of flexor digiti minimi brevis?

Answer 27

Flexion at metatarsophalangeal joint 5

Question 28

Innervation of flexor digiti minimi brevis?

Answer 28

Lateral plantar nerve (S2-S3)

Question 29

Origin of adductor hallucis?

Answer 29

Oblique head: Bases of metatarsals 2-4, lateral cuneiform, cuboid tarsal, tendon of fibularis longus
Transverse head: Plantar metatarsophalangeal ligaments of toes 3-5, deep transverse metatarsal ligaments of toes 3-5

Question 30

Insertion of adductor hallucis?

Answer 30

Lateral aspect of base of proximal phalanx of great toe

Question 31

Action of adductor hallucis?

Answer 31

Adduction + flexion of metatarsophalangeal joint 1, supports the transverse and longitudinal arches of foot

Question 32

Innervation of adductor hallucis?

Answer 32

Lateral plantar nerve (S2-S3)

Question 33

Origin of the three plantar interossei?

Answer 33

Medial aspects of metatarsal bones 3-5

Question 34

Insertion of the three plantar interossei?

Answer 34

Medial bases of proximal phalanges and extensor expansion of digits 3-5

Question 35

Action of the three plantar interossei?

Answer 35

Flexion + adduction at metatarsophalangeal joints 3-5, extension at interphalangeal joints 3-5

Question 36

Innervation of the three plantar interossei?

Answer 36

Lateral plantar nerve (S2-S3)

Question 37

Origin of the four dorsal interossei?

Answer 37

Opposing sides of metatarsal bones 1-5

Question 38

Insertion of the four dorsal interossei?

Answer 38

1st dorsal interosseous: Medial base of proximal phalanx of second digit
2-4 dorsal interossei: Lateral bases of proximal phalanges and extensor expansion of digits 2-4

Question 39

Action of the four dorsal interossei?

Answer 39

Flexion + abduction at metatarsophalangeal joints 2-4, extension at interphalangeal joints 2-4

Question 40

Innervation of the four dorsal interossei?

Answer 40

Lateral plantar nerve (S2-S3)

Question 41

Origin of extensor hallucis brevis?

Answer 41

Superolateral aspect of the calcaneus

Question 42

Insertion of extensor hallucis brevis?

Answer 42

Proximal phalanx of great toe

Question 43

Action of extensor hallucis brevis?

Answer 43

Extension at metatarsophalangeal joint 1

Question 44

Innervation of extensor hallucis brevis?

Answer 44

Deep fibular/peroneal nerve (S1-S2)

Question 45

Origin of extensor digitorum brevis?

Answer 45

Superolateral surface of calcaneus, interosseous talocalcaneal ligament, stem of inferior extensor retinaculum

Question 46

Insertion of extensor digitorum brevis?

Answer 46

Extensor digitorum longus tendons of toes 2-5

Question 47

Action of extensor digitorum brevis?

Answer 47

Extension at distal interphalangeal joints 2-5

Question 48

Innervation of extensor digitorm brevis?