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S1 Anatomy > Ankle and Foot Muscles > Flashcards

Ankle and Foot Muscles Flashcards

1
Q

muscles of the dorsum of the foot

A

extensor digitorum brevis

extensor hallucis brevis

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2
Q

extensor digitorum brevis

-origin

A

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

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3
Q

extensor digitorum brevis

-insertion

A

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

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4
Q

extensor digitorum brevis

-actions

A

extend toes 2-4 at MTP joint

assist extensor digitorum longus

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5
Q

extensor digitorum brevis

-innervation

A

deep peroneal nerve (L5, S1)

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6
Q

extensor hallucis brevis

-origin

A

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

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7
Q

extensor hallucis brevis

-insertion

A

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

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8
Q

extensor hallucis brevis

-actions

A

extend hallux at MTP joint

assist extensor hallucis longus

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9
Q

extensor hallucis brevis

-innervation

A

deep peroneal nerve (L5, S1)

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10
Q

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

A

abductor hallucis
flexor digitorum brevis
abductor digiti minimi

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11
Q

abductor hallucis

-origin

A

medial process of tuber calcaneus
flexor retinaculum
plantar aponeurosis

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12
Q

abductor hallucis

-insertion

A

medial side of base of proximal phalanx of hallux

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13
Q

abductor hallucis

-actions

A

hallux abduction

hallux flexion

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14
Q

abductor hallucis

-innervation

A

medial plantar nerve (S1, S2)

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15
Q

flexor digitorum brevis

-origin

A

medial process of tuber calcaneus
plantar aponeurosis
intermuscular suptum

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16
Q

flexor digitorum brevis

-insertion

A

both sides of middle phalanx of lateral four digits

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17
Q

flexor digitorum brevis

-actions

A

flexes lateral 4 digits at the PIP joint

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18
Q

flexor digitorum brevis

-innervation

A

medial plantar nerve (S1, S2)

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19
Q

abductor digiti minimi

-origin

A

medial and lateral processes of tuber calcanei
plantar aponeurosis
intermuscular septum

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20
Q

abductor digiti minimi

-insertion

A

lateral side of base of proximal phalanx of 5th digit

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21
Q

abductor digiti minimi

-actions

A

abducts 5th digit

flexes 5th digit

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22
Q

abductor digiti minimi

-innervation

A

lateral plantar nerve (S2, S3)

23
Q

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

A

quadratus plantae

lumbricals

24
Q 
quadratus plantae (flexor accessorius)
-origin
A

medial surface of lateral margin of plantar surface of calcaneus

25
Q 
quadratus plantae (flexor accessorius)
-insertion
A

posterolateral margin of tendon of flexor digitorum longus

26
Q 
quadratus plantae (flexor accessorius)
-actions
A

assists FDL in flexion lateral 4 digits

27
Q 
quadratus plantae (flexor accessorius)
-innervation
A

lateral plantar nerve (S2, S3)

28
Q

lumbricals

-origin

A

tendons of FDL

29
Q

lumbricals

-insertion

A

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

30
Q

lumbricals

-actions

A

flex proximal phalanges of lateral 4 digits

extend middle and distal phalanges of lateral 4 digits

31
Q

lumbricals

-innervation

A

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

32
Q

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

A

flexor hallucis brevis
adductor hallucis
flexor digiti minimi brevis

33
Q

flexor hallucis brevis

-origin

A

plantar surface of cuboid

plantar surface of lateral cuneiform bones

34
Q

flexor hallucis brevis

-insertion

A

both sides of base of proximal phalanx of hallux

35
Q

flexor hallucis brevis

-actions

A

flexes proximal phalanx of hallux

36
Q

flexor hallucis brevis

-innervation

A

medial plantar nerve (S1, S2)

37
Q

adductor hallucis

-origin

A

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

38
Q

adductor hallucis

-insertion

A

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

39
Q

adductor hallucis

-actions

A

hallux adduction

assists in maintaining transverse arch

40
Q

adductor hallucis

-innervation

A

lateral plantar nerve (S2, S3)

41
Q

flexor digiti minimi brevis

-origin

A

base of 5th metatarsal bone

42
Q

flexor digiti minimi brevis

-insertion

A

base of proximal phalanx of 5th digit

43
Q

flexor digiti minimi brevis

-action

A

flexes proximal phalanx of 5th digit

44
Q

flexor digiti minimi brevis

-innervation

A

lateral plantar nerve (S2, S3)

45
Q

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

A

plantar interossei

dorsal interossei

46
Q 
plantar interossei (3 muscles)
-origin
A

bases and medial sides of metatarsal bones 3-5

47
Q

plantar interossei

-insertion

A

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

48
Q

plantar interossei

-actions

A

adducts digits 3-5

flexes MTP joints

49
Q

plantar interossei

-innervation

A

lateral plantar nerve (S2, S3)

50
Q 
dorsal interossei (4 muscles)
-origin
A

adjacent sides of metatarsal bones 1-5

51
Q

dorsal interossei

-insertion

A

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

52
Q

dorsal interossei

-actions

A

abducts digits (2-4) and MTP joints

53
Q

dorsal interossei

-innervation

A

lateral plantar nerve (S2-S3)

S1 Anatomy (31 decks)

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