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MABS Anatomy Forearm and Hand > Forearm > Flashcards

Forearm Flashcards

1
Q

pronator teres origin?

A

medial humeral epicondyle and coronoid process of ulna

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2
Q

pronator teres distal?

A

mid-shaft of radius

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3
Q

pronator teres innervation?

A

median n

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4
Q

pronator teres action?

A

forearm pronation

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5
Q

flexor carpi radialis (FCR) origin?

A

medial humeral epicondyle

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6
Q

flexor carpi radialis (FCR) distal?

A

base of metacarpals II and III

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7
Q

flexor carpi radialis (FCR) innervation?

A

median n

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8
Q

flexor carpi radialis (FCR) action?

A

wrist flexion and abduction

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9
Q

palmaris longus origin?

A

medial humeral epicondyle

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10
Q

palmaris longus distal?

A

palmar Fascia (aponeurosis)

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11
Q

palmaris longus innervation?

A

median n

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12
Q

palmaris longus action?

A

flexion at wrist

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13
Q

flexor carpi ulnaris origin?

A

medial humeral epicondyle; ulna

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14
Q

flexor carpi ulnaris distal?

A

pisiform carpal bone

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15
Q

flexor carpi ulnaris innervation?

A

ulnar n

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16
Q

flexor carpi ulnaris action?

A

flexion and adduction at wrist

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17
Q

flexor digitorum superficialis (FDS) origin?

A

medial epicondyle of the humerus and oblique line of the radius

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18
Q

flexor digitorum superficialis (FDS) distal?

A

middle phalanges of digits 2-5

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19
Q

flexor digitorum superficialis (FDS) innervation?

A

median n

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20
Q

flexor digitorum superficialis (FDS) action?

A

middle phalanges of medial four fingers at proximal interphalangeal joints

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21
Q

flexor digitorum profundus (FDP) origin?

A

anterior and medial surface of ulna and interosseous membrane: It divides into four tendons that pass posterior to FDS tendons and flexor retinaculum

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22
Q

flexor digitorum profundus (FDP) distal?

A

distal phalanges of digits 2-5.

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23
Q

flexor digitorum profundus (FDP) innervation?

A

lateral half by median n; medial by ulnar n

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24
Q

flexor digitorum profundus (FDP) action?

A

only m to flex distal interphalangeal joints

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25
Q

flexor pollicis longus (FPL) origin?

A

inferior radius

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26
Q

flexor pollicis longus (FPL) distal?

A

distal phalanx of thumb

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27
Q

flexor pollicis longus (FPL) innervation?

A

median n

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28
Q

flexor pollicis longus (FPL) action?

A

Flexes thumb’s interphalangeal joint and MCP joint

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29
Q

pronator quadratus origin?

A

anterior ulna

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30
Q

pronator quadratus distal?

A

anterior radius

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31
Q

pronator quadratus innervation?

A

median n

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32
Q

pronator quadratus action?

A

pronates forearm

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33
Q

brachioradialis origin?

A

supra-epicondylar ridge of humerus

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34
Q

brachioradialis distal?

A

distal radius proximal to styloid process

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35
Q

brachioradialis innervation?

A

radial nerve (C5, C6, C7)

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36
Q

brachioradialis action?

A

weak forearm flexion, maximum in mid-pronated position

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37
Q

extensor carpi radialis longus (ECRL) origin?

A

supra-epicondylar ridge of humerus

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38
Q

extensor carpi radialis longus (ECRL) distal?

A

base of 2nd metacarpal dorsally

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39
Q

extensor carpi radialis longus (ECRL) innervation?

A

radial nerve (C6, C7)

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40
Q

extensor carpi radialis longus (ECRL) action?

A

extend and abduct the hand, active during clenching

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41
Q

extensor carpi radialis brevis (ECRB) origin?

A

lateral epicondyle of humerus via the common extensor tendon

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42
Q

extensor carpi radialis brevis (ECRB) distal?

A

base of 3rd metacarpal dorsally

43
Q

extensor carpi radialis brevis (ECRB) innervation?

A

radial nerve (C6, C7)

44
Q

extensor carpi radialis brevis (ECRB) action?

A

extend and abduct the hand, active during clenching

45
Q

extensor digitorum origin?

A

lateral epicondyle of humerus via the common extensor tendon

46
Q

extensor digitorum distal?

A

extensor expansions of medial 4 digits

47
Q

extensor digitorum innervation?

A

deep branch of radial nerve (C7, C8)

48
Q

extensor digitorum action?

A

extends medial 4 digits at metacarpophalangeal and interphalangeal joints

49
Q

extensor digiti minimi (EDM) origin?

A

lateral epicondyle of humerus via the common extensor tendon

50
Q

extensor digiti minimi (EDM) distal?

A

extensor expansions of 5th digit

51
Q

extensor digiti minimi (EDM) innervation?

A

deep branch of radial nerve (C7, C8)

52
Q

extensor digiti minimi (EDM) action?

A

extends 5th digit at metacarpophalangeal and interphalangeal joints

53
Q

extensor carpi ulnaris (ECU) origin?

A

lateral epicondyle of humerus via the common extensor tendon, ulna

54
Q

extensor carpi ulnaris (ECU) distal?

A

base of 5th metacarpal dorsally

55
Q

extensor carpi ulnaris (ECU) innervation?

A

deep branch of radial nerve (C7, C8)

56
Q

extensor carpi ulnaris (ECU) action?

A

extends and adducts hand (also active during fist clenching)

57
Q

supinator origin?

A

lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa and ulna

58
Q

supinator distal?

A

lateral, posterior and anterior surfaces of radius

59
Q

supinator innervation?

A

deep branch of radial n

60
Q

supinator action?

A

supinates forearm

61
Q

extensor indicis origin?

A

posterior surface of the ulna and interosseous membrane

62
Q

extensor indicis distal?

A

extensor expansion of 2nd digit

63
Q

extensor indicis innervation?

A

radial (posterior interosseous) n

64
Q

extensor indicis action?

A

extends 2nd digit, helps extend hand at wrist

65
Q

extensor pollicis brevis origin?

A

radius ;interosseous membrane

66
Q

extensor pollicis brevis distal?

A

proximal phalanx of thumb

67
Q

extensor pollicis brevis innervation?

A

radial (posterior interosseous) n

68
Q

extensor pollicis brevis action?

A

short extensor of the thumb at MCP joint

69
Q

Opponens Pollicis origin?

A

tubercle of the trapezium, and the associated flexor retinaculum.

70
Q

Opponens Pollicis distal?

A

lateral surface of the first metacarpal

71
Q

Opponens Pollicis innervation?

A

median n

72
Q

Opponens Pollicis action?

A

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

73
Q

Abductor Pollicis Brevis origin?

A

tubercles of the scaphoid and trapezium; flexor retinaculum

74
Q

Abductor Pollicis Brevis distal?

A

lateral side of proximal phalanx of the thumb

75
Q

Abductor Pollicis Brevis innervation?

A

median n

76
Q

Abductor Pollicis Brevis action?

A

Abducts the thumb

77
Q

Flexor Pollicis Brevis origin?

A

tubercle of the flexor retinaculum

78
Q

Flexor Pollicis Brevis distal?

A

base of the proximal phalanx of the thumb.

79
Q

Flexor Pollicis Brevis innervation?

A

median n

80
Q

Flexor Pollicis Brevis action?

A

flexes MCP1 (thumb)

81
Q

Opponens Digiti Minimi origin?

A

hamulus of hamate

82
Q

Opponens Digiti Minimi distal?

A

medial margin of metacarpal V

83
Q

Opponens Digiti Minimi innervation?

A

ulnar n

84
Q

Opponens Digiti Minimi action?

A

It rotates metacarpal of digit 5 towards palm, producing opposition

85
Q

Abductor Digiti Minimi origin?

A

pisiform; tendon of FCR

86
Q

Abductor Digiti Minimi distal?

A

base of the proximal phalanx of the little finger

87
Q

Abductor Digiti Minimi innervation?

A

ulnar n

88
Q

Abductor Digiti Minimi action?

A

abducts digit 5 [D5]

89
Q

Flexor Digiti Minimi Brevis origin?

A

Hamulus of flexor retinaculum

90
Q

Flexor Digiti Minimi Brevis distal?

A

proximal phalanx of digit 5

91
Q

Flexor Digiti Minimi Brevis innervation?

A

ulnar n

92
Q

Flexor Digiti Minimi Brevis action?

A

Flexes the MCP joint of digit 5

93
Q

dorsal interossei origin?

A

Each interossei originates from lateral and medial surfaces of metacarpals

94
Q

dorsal interossei distal?

A

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

95
Q

dorsal interossei innervation?

A

ulnar n

96
Q

dorsal interossei action?

A

abduct fingers at metacarpalphalangeal (MCP) joint

97
Q

palmar interossei origin?

A

Each interossei

98
Q

palmar interossei distal?

A

medial or lateral surface of a metacarpal (2, 3, 5) and attaches into the extensor hood and proximal phalanx of same finger (digit).

99
Q

palmar interossei innervation?

A

ulnar n

100
Q

palmar interossei action?

A

adducts fingers at MCP joint.

101
Q

lumbricals origin?

A

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

102
Q

lumbricals distal?

A

into the extensor hood

103
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

104
Q

lumbricals action?

A

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

MABS Anatomy Forearm and Hand (2 decks)

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