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MABS Anatomy Forearm and Hand > Hand > Flashcards

Hand Flashcards

1
Q

Opponens Pollicis origin?

A

tubercle of the trapezium, and the associated flexor retinaculum.

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2
Q

Opponens Pollicis distal?

A

lateral surface of the first metacarpal

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3
Q

Opponens Pollicis innervation?

A

median n

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4
Q

Opponens Pollicis action?

A

Opposes the thumb, by medially rotating and flexing metacarpal on trapezium.

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5
Q

Abductor Pollicis Brevis origin?

A

tubercles of the scaphoid and trapezium; flexor retinaculum

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6
Q

Abductor Pollicis Brevis distal?

A

lateral side of proximal phalanx of the thumb

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7
Q

Abductor Pollicis Brevis innervation?

A

median n

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8
Q

Abductor Pollicis Brevis action?

A

Abducts the thumb

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9
Q

Flexor Pollicis Brevis origin?

A

tubercle of the flexor retinaculum

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10
Q

Flexor Pollicis Brevis distal?

A

base of the proximal phalanx of the thumb.

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11
Q

Flexor Pollicis Brevis innervation?

A

median n

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12
Q

Flexor Pollicis Brevis action?

A

flexes MCP1 (thumb)

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13
Q

Opponens Digiti Minimi origin?

A

hamulus of hamate

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14
Q

Opponens Digiti Minimi distal?

A

medial margin of metacarpal V

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15
Q

Opponens Digiti Minimi innervation?

A

ulnar n

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16
Q

Opponens Digiti Minimi action?

A

It rotates metacarpal of digit 5 towards palm, producing opposition

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17
Q

Abductor Digiti Minimi origin?

A

pisiform; tendon of FCR

18
Q

Abductor Digiti Minimi distal?

A

base of the proximal phalanx of the little finger

19
Q

Abductor Digiti Minimi innervation?

A

ulnar n

20
Q

Abductor Digiti Minimi action?

A

abducts digit 5 [D5]

21
Q

Flexor Digiti Minimi Brevis origin?

A

Hamulus of flexor retinaculum

22
Q

Flexor Digiti Minimi Brevis distal?

A

proximal phalanx of digit 5

23
Q

Flexor Digiti Minimi Brevis innervation?

A

ulnar n

24
Q

Flexor Digiti Minimi Brevis action?

A

Flexes the MCP joint of digit 5

25
Q

dorsal interossei origin?

A

Each interossei originates from lateral and medial surfaces of metacarpals

26
Q

dorsal interossei distal?

A

attach into extensor hood (AKA expnation) and proximal phalanx of each finger

27
Q

dorsal interossei innervation?

A

ulnar n

28
Q

dorsal interossei action?

A

abduct fingers at metacarpalphalangeal (MCP) joint

29
Q

palmar interossei origin?

A

Each interossei

30
Q

palmar interossei distal?

A

medial or lateral surface of a metacarpal (2, 4, 5) and attaches into the extensor hood and proximal phalanx of same finger (digit).

31
Q

palmar interossei innervation?

A

ulnar n

32
Q

palmar interossei action?

A

adducts fingers at MCP joint.

33
Q

lumbricals origin?

A

from a tendon of flexor digitorum profundus They pass dorsally and laterally around each finger

34
Q

lumbricals distal?

A

into the extensor hood

35
Q

lumbricals innervation?

A

The lateral two lumbricals (of the index [D2] and middle [D3] fingers innervated by the median n
medial two lumbricals (little [D5], and ring [D4]fingers) are innervated by the ulnar n

36
Q

lumbricals action?

A

flex at the MCP joint, and extend at IP joints of each finger

37
Q

adductor pollicis origin?

A

oblique head - base of 2nd and 3rd metacarpal

transverse head - anterior surface of shaft of 3rd metacarpal

38
Q

adductor pollicis distal?

A

medial side of base for proximal phalanx of thumb

39
Q

adductor pollicis innervation?

A

ulnar

40
Q

adductor pollicis action?

A

adducts the thumb toward the lateral border of the palm

MABS Anatomy Forearm and Hand (2 decks)

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