Ankle and Foot Muscles Flashcards Preview

S1 Anatomy > Ankle and Foot Muscles > Flashcards

Flashcards in Ankle and Foot Muscles Deck (53):
1

muscles of the dorsum of the foot

extensor digitorum brevis
extensor hallucis brevis

2

extensor digitorum brevis
-origin

anterior part of dorsal surface of calcaneus
anterior and medial to lateral malleolus
inferior extensor retinaculum

3

extensor digitorum brevis
-insertion

lateral 3 tendons attach to tendons of digitorum longus to digits 2-4

4

extensor digitorum brevis
-actions

extend toes 2-4 at MTP joint
assist extensor digitorum longus

5

extensor digitorum brevis
-innervation

deep peroneal nerve (L5, S1)

6

extensor hallucis brevis
-origin

anterior part of dorsal surface of calcaneus
anterior and medial to lateral malleolus
inferior extensor retinaculum
(all same as EDB)

7

extensor hallucis brevis
-insertion

medial tendon of 4 tendons to base of proximal phalanx of hallux

8

extensor hallucis brevis
-actions

extend hallux at MTP joint
assist extensor hallucis longus

9

extensor hallucis brevis
-innervation

deep peroneal nerve (L5, S1)

10

muscles of the first (superficial) layer of the plantar surface of the foot

abductor hallucis
flexor digitorum brevis
abductor digiti minimi

11

abductor hallucis
-origin

medial process of tuber calcaneus
flexor retinaculum
plantar aponeurosis

12

abductor hallucis
-insertion

medial side of base of proximal phalanx of hallux

13

abductor hallucis
-actions

hallux abduction
hallux flexion

14

abductor hallucis
-innervation

medial plantar nerve (S1, S2)

15

flexor digitorum brevis
-origin

medial process of tuber calcaneus
plantar aponeurosis
intermuscular suptum

16

flexor digitorum brevis
-insertion

both sides of middle phalanx of lateral four digits

17

flexor digitorum brevis
-actions

flexes lateral 4 digits at the PIP joint

18

flexor digitorum brevis
-innervation

medial plantar nerve (S1, S2)

19

abductor digiti minimi
-origin

medial and lateral processes of tuber calcanei
plantar aponeurosis
intermuscular septum

20

abductor digiti minimi
-insertion

lateral side of base of proximal phalanx of 5th digit

21

abductor digiti minimi
-actions

abducts 5th digit
flexes 5th digit

22

abductor digiti minimi
-innervation

lateral plantar nerve (S2, S3)

23

muscles of the second layer of the plantar surface of the foot

quadratus plantae
lumbricals

24

quadratus plantae (flexor accessorius)
-origin

medial surface of lateral margin of plantar surface of calcaneus

25

quadratus plantae (flexor accessorius)
-insertion

posterolateral margin of tendon of flexor digitorum longus

26

quadratus plantae (flexor accessorius)
-actions

assists FDL in flexion lateral 4 digits

27

quadratus plantae (flexor accessorius)
-innervation

lateral plantar nerve (S2, S3)

28

lumbricals
-origin

tendons of FDL

29

lumbricals
-insertion

medial sides of bases of proximal phalanges of lateral 4 digits
extensor expansions of tendons of EDL

30

lumbricals
-actions

flex proximal phalanges of lateral 4 digits
extend middle and distal phalanges of lateral 4 digits

31

lumbricals
-innervation

medial lumbrical
-medial plantar nerve (S2, S3)
lateral 3 lumbricals
-lateral plantar nerve (S2, S3)

32

muscles of the third layer of the plantar surface of the foot

flexor hallucis brevis
adductor hallucis
flexor digiti minimi brevis

33

flexor hallucis brevis
-origin

plantar surface of cuboid
plantar surface of lateral cuneiform bones

34

flexor hallucis brevis
-insertion

both sides of base of proximal phalanx of hallux

35

flexor hallucis brevis
-actions

flexes proximal phalanx of hallux

36

flexor hallucis brevis
-innervation

medial plantar nerve (S1, S2)

37

adductor hallucis
-origin

oblique head
-bases of metatarsals 2-4
transverse head
-plantar ligaments of MTP joint

38

adductor hallucis
-insertion

tendons of both heads attach to lateral side of base of proximal phalanx of hallux

39

adductor hallucis
-actions

hallux adduction
assists in maintaining transverse arch

40

adductor hallucis
-innervation

lateral plantar nerve (S2, S3)

41

flexor digiti minimi brevis
-origin

base of 5th metatarsal bone

42

flexor digiti minimi brevis
-insertion

base of proximal phalanx of 5th digit

43

flexor digiti minimi brevis
-action

flexes proximal phalanx of 5th digit

44

flexor digiti minimi brevis
-innervation

lateral plantar nerve (S2, S3)

45

muscles of the fourth layer of the plantar surface of the foot

plantar interossei
dorsal interossei

46

plantar interossei (3 muscles)
-origin

bases and medial sides of metatarsal bones 3-5

47

plantar interossei
-insertion

medial side of bases of proximal phalanges of digits 3-5

48

plantar interossei
-actions

adducts digits 3-5
flexes MTP joints

49

plantar interossei
-innervation

lateral plantar nerve (S2, S3)

50

dorsal interossei (4 muscles)
-origin

adjacent sides of metatarsal bones 1-5

51

dorsal interossei
-insertion

1st
-medial side of proximal phalanx of 2nd digit
2-4
-lateral sides of digits 2-4

52

dorsal interossei
-actions

abducts digits (2-4) and MTP joints

53

dorsal interossei
-innervation

lateral plantar nerve (S2-S3)