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Flashcards in Foot Muscles Deck (46):
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First layer of muscles of sole of foot

Abductor hallucis, flexor digitorum brevis, abductor digiti minimi

1

Second layer of sole of foot

Quadratus plantae and lumbricals

2

Third layer of sole of foot

Flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis

3

Fourth layer of sole of foot

Plantar interossei (3) and dorsal interossei (4)

4

Abductor hallucis origin

Medial tubercle of tuberosity of calcaneus, flexor retinaculum and plantar aponeurosis

5

Abductor hallucis insertion

Medial side of base of proximal phalanx of 1st digit

6

Abductor hiatus innervation

Medial plantar nerve
S2, s3

7

Abductor hiatus action

Abducts and flexes first digit

8

Flexor digitorum brevis origin

Medial tubercle of tuberosity of calcaneus, plantar aponeurosis, and intermuscular septa

9

Flexor digitorum brevis insertion

Both sides of middle phalanges of lateral four digits

10

Flexor digitorum brevis innervation

Medial plantar nerve
S2, s3

11

Flexor digitorum brevis action

Flexes lateral four digits

12

Abductor digiti minimi origin

Medial and lateral tubercles of tuberosity of calcaneus, plantar aponeurosis and intermuscular septa

13

Abductor digiti minimi insertion

Lateral side of base of proximal phalanx of fifth digit

14

Abductor digiti minimi innervation

Lateral plantar nerve
S2, s3

15

Abductor digiti minimi action

Abducts and flexes fifth digit

16

Quadratus plantae origin

Medial surface and lateral margin of plantar surface of calcaneus

17

Quadratus plantae insertion

Posterolateral margin of tendon of flexor digitorum brevis

18

Quadratus plantae innervation

Lateral plantar nerve
S2, s3

19

Quadratus plantae action

Assists flexor digitorum longus in flexing lateral four digits

20

Lumbricals origin

Tendons of flexor digitorum longus

21

Lumbricals insertion

Medial aspect of expansion over lateral four digits

22

Lumbricals innervation

Medial one: medial plantar nerve, s2, s3
Lateral three: lateral plantar nerve, s2, s3

23

Lumbricals action

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

24

Flexor hallucis brevis origin

Plantar surfaces of cuboid and lateral cuneiform

25

Flexor hallucis brevis insertion

Both sides of base of proximal phalanx of 1st digit

26

Flexor hallucis brevis innervation

Medial plantar nerve s2, s3

27

Flexor hallucis brevis action

Flexes proximal phalanx of 1st digit

28

Adductor hallucis origin

Oblique head: bases of metatarsals 2-4
Transverse head: plantar ligaments of 3rd to 5th metatarsophalangeal joints

29

Adductor hallucis insertion

Tendons of both heads attach to lateral side of base of proximal phalanx of 1st digit

30

Adductor hallucis innervation

Deep branch of lateral plantar nerve
S2, s3

31

Adductor hallucis action

Adducts first digit
Assists in maintaining transverse arch of foot

32

Flexor digiti minimi brevis origin

Base of fifth metatarsal

33

Flexor digiti minimi brevis insertion

Base of proximal phalanx of fifth digit

34

Flexor digiti minimi brevis innervation

Superficial branch of lateral plantar nerve
S2, s3

35

Flexor digiti minimi brevis action

Flexes proximal phalanx of fifth digit

36

Flexor digiti minimi brevis innervation

Superficial branch of lateral plantar nerve s2, s3

37

Flexor digiti minimi action

Flexes proximal phalanx of fifth digit, thereby assisting with its flexion

38

Plantar interossei origin

Bases and medial sides of metatarsals 3-5

39

Plantar interossei insertion

Medial sides of bases of proximal phalanges of 3rd-5th digits

40

Plantar interossei innervation

Lateral plantar nerve
S2, s3

41

Plantar interossei action

Adduct digits 3-5 and flex metatarsophalangeal joints

42

Dorsal interossei origin

Adjacent sides of metatarsals 1-5

43

Dorsal interossei insertion

First: medial side of proximal phalanx of 2nd digit
Second to fourth: lateral sides of 2nd to 4th digits

44

Dorsal interossei innervation

Lateral plantar nerve
S2, s3

45

Dorsal interossei action

Abduct digits 2-4 and flex metatarsophalangeal joints