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Gross Anatomy I > Muscles of Hand > Flashcards

Muscles of Hand Flashcards

1
Q

abductor pollicis brevis (APB) proximal attachment

A

flexor retinaculum and tubercles of scaphoid and trapezium

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2
Q

APB distal attachment

A

lateral side of base of proximal phalanx of thumb

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3
Q

APB innervation

A

recurrent branch of median nerve (C8, T1)

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4
Q

APB muscle action

A

abducts thumb, helps oppose it

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5
Q

Flexor pollicis brevis (FPB) superficial head and deep head proximal attachment

A

flexor retinaculum and tubercles of scaphoid and trapezium (same as APB)

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6
Q

FPB superficial head and deep head distal attachment

A

lateral side of base of proximal phalanx of thumb (same as APB)

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7
Q

FPB superficial head innervation

A

recurrent branch of median nerve (C8, T1)

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8
Q

FPB deep head innervation

A

deep branch of ulnar nerve (C8, T1)

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9
Q

opponens pollicis proximal attachment

A

flexor retinaculum and tubercles of scaphoid and trapezium (same as APB and FPB)

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10
Q

opponens pollicis distal attachment

A

lateral side of 1st metacarpal

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11
Q

opponens pollicis innervation

A

recurrent branch of median nerve (C8, T1)

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12
Q

opponens pollicis muscle action

A

oppose thumb, draws 1st metacarpal medially to center of palm and rotates it medially

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13
Q

adductor pollicis oblique head proximal attachment

A

base of 2nd and 3rd metacarpal, capitate and adjacent carpals

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14
Q

adductor pollicis transverse head proximal attachment

A

anterior surface of shaft of 3rd metacarpal

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15
Q

adductor pollicis oblique and transverse head distal attachment

A

medial side of base of proximal phalanx of thumb

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16
Q

adductor pollicis innervation

A

deep branch of ulnar nerve (C8, T1)

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17
Q

adductor pollicis muscle action

A

adducts thumb toward lateral border of palm

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18
Q

dorsal interossei muscles 1-4 proximal attachment

A

adjacent side of two metacarpals

19
Q

dorsal interossei 1-4 distal attachment

A

bases of proximal phalanges; extensor expansions of digits 2-4

20
Q

dorsal interossei 1-4 innervation

A

deep branch of ulnar nerve (C8, T1)

21
Q

dorsal interossei 1-4 muscle action

A

abduct digits 2-4 from axial line; act with lumbricals to flex metacarpophlangeal joints and extending interphalangeal joints

22
Q

palmar interossei 1-3 proximal attachment

A

palmar surfaces of metacarpals 2,4,5

23
Q

palmar interossei 1-3 distal attachment

A

bases of proximal phalanges, extensor expansions of digits 2,4,5

24
Q

palmar interossei innervation

A

deep branch of ulnar nerve (C8, T1)

25
Q

palmar interossei 1-3 muscle action

A

adduct 2,4,5 digits toward axial line. assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints; extensor expansions of 2-4 digits

26
Q

1st and 2nd lumbrical proximal attachment

A

lateral two tendons of flexor digitorum profundus

27
Q

1st and 2nd lumbrical distal attachment

A

lateral sides of extensor expansions of 2nd and 5th digits

28
Q

1st and 2nd lumbrical innervation

A

median nerve (C8, T1)

29
Q

1st and 2nd lumbrical muscle action

A

flex metacarpophalangeal joints; extend interphalangeal joints of 2nd and 5th digits

30
Q

abductor digiti minimi (ADM) proximal attachment

A

pisiform

31
Q

ADM distal attachment

A

medial side of base of proximal phalanx of 5th digit

32
Q

ADM innervation

A

deep branch of ulnar nerve (C8, T1)

33
Q

ADM muscle action

A

abducts 5th digit, assists in flexion of its proximal phalanx

34
Q

flexor digiti minimi (FDM) brevis proximal attachment

A

hook of hamate and flexor retinaculum

35
Q

FDM brevis distal attachment

A

medial side of base of proximal phalanx of 5th digit

36
Q

FDM brevis innervation

A

deep branch of ulnar nerve (C8, T1)

37
Q

FDM brevis muscle action

A

flexes proximal phalanx of 5th digit

38
Q

opponens digiti minimi (ODM) proximal attachment

A

hook of hamate and flexor retinaculum

39
Q

ODM distal attachment

A

medial border of 5th metacarpal

40
Q

ODM innervation

A

deep branch of ulnar nerve (C8, T1)

41
Q

what runs through the guyon’s tunnel?

A

ulnar nerve and ulnar artery

42
Q

floor of guyon’s tunnel

A

flexor retinaculum

43
Q

roof of guyon’s tunnel

A

volar carpal ligament

Gross Anatomy I (4 decks)

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