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PT 504 Anatomy Lab > Forearm and Hand Muscles - Hand > Flashcards

Forearm and Hand Muscles - Hand Flashcards

1
Q

brachioradialis origin

A

Proximal 2/3 of supracondylar ridge of humerus

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2
Q

brachioradialis insertion

A

lateral surface of distal end of radius proximal to styloid process

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3
Q

brachioradialis action

A

Weak flexion of forearm; maximal when forearm is mid pronation

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4
Q

brachioradialis innervation

A

Radial nerve (C5,C6,C7)

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5
Q

extensor carpi radialis longus origin

A

Lateral supraepicondylar ridge of humerus

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6
Q

extensor carpi radialis longus insertion

A

Dorsal aspect of base of 2nd metacarpal

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7
Q

extensor carpi radialis longus action

A

Extend and abduct hand at the wrist joint; active during fist clenching

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8
Q

extensor carpi radialis longus innervation

A

Radial Nerve (C6,C7)

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9
Q

extensor carpi radialis brevis origin

A

Lateral epicondyle of humerus (common extensor origin)

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10
Q

extensor carpi radialis brevis insertion

A

Dorsal aspect of base of 3rd metacarpal

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11
Q

extensor carpi radialis brevis action

A

Extend and abduct hand at the wrist joint; active during fist clenching

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12
Q

extensor carpi radialis brevis innervation

A

Deep branch of radial nerve (C7,C8)

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13
Q

extensor digitorum origin

A

Lateral epicondyle of humerus (common extensor origin)

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14
Q

extensor digitorum insertion

A

Extensor expansions of medial four digits

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15
Q

extensor digitorum action

A

Extends medial four digits primarily at MCP joint, secondarily at IP joints

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16
Q

extensor digitorum innervation

A

Deep branch of radial nerve (C7,C8)

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17
Q

extensor digiti minimi origin

A

Lateral epicondyle of humerus (common extensor origin)

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18
Q

extensor digiti minimi insertion

A

Extensor expansion of 5th digit

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19
Q

extensor digiti minimi action

A

Extends 5th digit primarily at MCP joint, secondarily at IP joint

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20
Q

extensor digiti minimi innervation

A

Deep branch of radial nerve (C7,C8)

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21
Q

extensor carpi ulnaris origin

A

Lateral epicondyle of humerus: posterior border of ulna

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22
Q

extensor carpi ulnaris insertion

A

Dorsal aspect of base of 5th metacarpal

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23
Q

extensor carpi ulnaris action

A

Extends and adducts hand at wrist joint (Also active during fist clenching)

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24
Q

extensor carpi ulnaris innervation

A

Deep branch of radial nerve (C7,C8)

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25
Q

supinator origin

A

Lateral epicondyle of humerus; radial collateral and anular ligaments; supinator fossa; crest of ulna

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26
Q

supinator insertion

A

Lateral, posterior, and anterior surfaces of proximal third of radius

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27
Q

supinator action

A

Supinates forearm

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28
Q

supinator innervation

A

Deep branch of radial nerve (C7,C8)

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29
Q

abductor pollicis longus origin

A

Posterior surface of proximal halves of ulna, radius, and interosseus membrane

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30
Q

abductor pollicis longus insertion

A

Base of 1st metacarpal

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31
Q

abductor pollicis longus action

A

Abducts thumb and extends it at CMC joint

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32
Q

abductor pollicis longus innervation

A

Posterior interosseus nerve (C7,C8) as a continuation of deep branch of radial nerve

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33
Q

extensor pollicis brevis origin

A

Posterior surface of distal third of radius and interosseous membrane

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34
Q

extensor pollicis brevis insertion

A

Dorsal aspect of base of proximal phalanx of thumb

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35
Q

extensor pollicis brevis action

A

Extends proximal phalanx of thumb at MCP joint; extends CMC joint

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36
Q

extensor pollicis brevis innervation

A

Posterior interosseous nerve (C7,C8) as a continuation of deep branch of radial nerve

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37
Q

extensor pollicis longus origin

A

Posterior surface of middle third of ulna and interosseous membrane

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38
Q

extensor pollicis longus insertion

A

Dorsal aspect of base of distal phalanx of thumb

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39
Q

extensor pollicis longus action

A

Extends distal phalanx of thumb at IP joint; extends MCP and CMC joints

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40
Q

extensor pollicis longus innervation

A

Posterior interosseous nerve (C7,C8) as a continuation of deep branch of radial nerve

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41
Q

extensor indicis origin

A

Posterior surface of lateral third of ulna and interosseous membrane

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42
Q

extensor indicis insertion

A

Extensor expansion of 2nd digit

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43
Q

extensor indicis action

A

Extends 2nd digit; helps extend hand at wrist

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44
Q

extensor indicis innervation

A

Posterior interosseous nerve (C7,C8) as a continuation of deep branch of radial nerve

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45
Q

pronator teres origin

A

Ulnar Head: coronoid process

Humeral head: medial epicondyle (Common flexor origin)

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46
Q

pronator teres insertion

A

Middle convexity of lateral surface of radius

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47
Q

pronator teres action

A

Pronates and flexes forearm at elbow

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48
Q

pronator teres innervation

A

Median nerve (C6,C7,C8)

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49
Q

flexor carpi radialis origin

A

Medial epicondyle of humerus (Common flexor origin)

50
Q

flexor carpi radialis insertion

A

Base of 2nd metacarpal

51
Q

flexor carpi radialis action

A

Flexes and abducts hand at wrist

52
Q

flexor carpi radialis innervation

A

Median nerve (C6,C7,C8)

53
Q

Palmaris longus origin

A

Medial epicondyle of humerus (Common flexor origin)

54
Q

Palmaris longus insertion

A

Distal half of flexor retinaculum and apex of palmar aponeurosis

55
Q

Palmaris longus action

A

Flexes hand at wrist and tenses palmar aponeurosis

56
Q

Palmaris longus innervation

A

median nerve (C6,C7)

57
Q

flexor carpi ulnaris origin

A

humeral head: Medial epicondyle of humerus (Common flexor origin)

Ulnar head: olecranon and posterior border

58
Q

flexor carpi ulnaris insertion

A

Pisiform, hook of hamate, 5th metacarpal

59
Q

flexor carpi ulnaris action

A

Flexes and adducts hand at wrist

60
Q

flexor carpi ulnaris innervation

A

Ulnar nerve (C7,C8)

61
Q

flexor digitorum superficialis origin

A

Medial epicondyle, coronoid process, radius distal to radial tuberosity

62
Q

flexor digitorum superficialis insertion

A

Shafts of middle phalanges of medial four digits

63
Q

flexor digitorum superficialis action

A

Flexes middle phalanges at proximal IP joints of middle four digits; acting more strongly, it flexes proximal phalanges at MCP joints

64
Q

flexor digitorum superficialis innervation

A

Median Nerve (C7,C8,T1)

65
Q

flexor digitorum profundus origin

A

Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

66
Q

flexor digitorum profundus insertion

A

Bases of distal phalanges 2-5

67
Q

flexor digitorum profundus action

A

Flexes distal phalanges 2-5 at distal IP joints

68
Q

flexor digitorum profundus innervation

A

Digits 2,3 via Anterior interosseous nerve (C8,T1) and digits 4,5 via ulnar nerve (C8,T1)

69
Q

flexor pollicis longus origin

A

Anterior surface of radius and adjacent interosseous membrane

70
Q

flexor pollicis longus insertion

A

Base of distal phalanx of thumb

71
Q

flexor pollicis longus action

A

Flexes phalanges of 1st digit

72
Q

flexor pollicis longus innervation

A

Anterior interosseous nerve from median nerve (C8,T1)

73
Q

pronator quadratus origin

A

Distal quarter of anterior surface of ulna

74
Q

pronator quadratus insertion

A

Distal quarter of anterior surface of radius

75
Q

pronator quadratus action

A

Pronates forearm; deep fibers bind radius and ulna together

76
Q

pronator quadratus innervation

A

Anterior interosseous nerve, from median nerve (C8,T1)

77
Q

abductor pollicis brevis origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

78
Q

abductor pollicis brevis insertion

A

Lateral side of base of proximal phalanx of thumb

79
Q

abductor pollicis brevis action

A

Abducts thumb; helps with opposition

80
Q

abductor pollicis brevis innervation

A

Recurrent branch of median nerve (C8,T1)

81
Q

flexor pollicis brevis origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

82
Q

flexor pollicis brevis insertion

A

Lateral side of base of proximal phalanx of thumb

83
Q

flexor pollicis brevis action

A

Flexes thumb, adducts thumb toward lateral border of palm

84
Q

flexor pollicis brevis innervation

A

Reccurent branch of median nerve (C8,T1) Deep branch of ulnar nerve (C8,T1)

85
Q

opponens pollicis origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

86
Q

opponens pollicis insertion

A

Lateral side of 1st metacarpal

87
Q

opponens pollicis action

A

Oppose thumb

88
Q

opponens pollicis innervation

A

Recurrant branch of median nerve (C8, T1)

89
Q

adductor pollicis origin

A

Bases of 2nd and 3rd metacarpals, capitate, and adjacent carpals; anterior surface of shaft of 3rd metacarpal

90
Q

adductor pollicis insertion

A

Medial side of base of proximal phalanx of thumb

91
Q

adductor pollicis action

A

Adducts thumb toward lateral border of palms

92
Q

adductor pollicis innervation

A

Deep branch of ulnar nerve (C8,T1)

93
Q

palmaris brevis origin

A

Flexor retinaculum and palmar aponeurosis

94
Q

palmaris brevis insertion

A

Skin of palm

95
Q

palmaris brevis action

A

Steadies and corrugates skin of palm to help with grip

96
Q

palmaris brevis innervation

A

Superficial branch of ulnar nerve (C8,T1)

97
Q

abductor digiti minimi origin

98
Q

abductor digiti minimi insertion

A

Medial side of base of proximal phalanx of 5th digit

99
Q

abductor digiti minimi action

A

Abducts 5th digit; assists in flexion of its proximal phalanx

100
Q

abductor digiti minimi innervation

A

Deep branch of ulnar nerve

101
Q

flexor digiti minimi origin

A

Hook of hamate and flexor retinaculum

102
Q

flexor digiti minimi insertion

A

Medial side of base of proximal phalanx of 5th digit

103
Q

flexor digiti minimi action

A

Flexes proximal phalanx of 5th digit

104
Q

flexor digiti minimi innervation

A

Deep branch of ulnar nerve (C8,T1)

105
Q

opponens digiti minimi origin

A

Hook of hamate and flexor retinaculum

106
Q

opponens digiti minimi insertion

A

Medial border of 5th metacarpal

107
Q

opponens digiti minimi action

A

Draws 5th metacarpal into opposition with the thumb

108
Q

opponens digiti minimi innervation

A

Deep branch of ulnar nerve (C8,T1)

109
Q

lumbricals origin

A

Tendons of flexor digitorum profundus

110
Q

lumbricals insertion

A

Lateral sides of extensor expansions of 2-5 digits

111
Q

lumbricals action

A

Flex MCP joints and extend IP joints of 2-5th digits

112
Q

lumbricals innervation

A

1st and 2nd via median nerve

3rd and 4th via deep branch of ulnar nerve

113
Q

palmar interossei origin

A

Palmar surfaces of 2nd, 4th, and 5th metacarpals

114
Q

palmar interossei insertion

A

Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th digits

115
Q

palmar interossei action

A

Adducts digits towards axial line; flexes MCP joints and extends IP joints; 2nd, 4th, and 5th digits

116
Q

palmar interossei innervation

A

Deep branch of ulnar nerve (C8,T1)

117
Q

dorsal interossei origin

A

Adjacent sides of two metacarpals

118
Q

dorsal interossei insertion

A

Bases of proximal phalanges; extensor expansion of 2-4 digits

119
Q

dorsal interossei action

A

Abducts digits 2-4 from axial line; flex MCP and extend IP

120
Q

dorsal interossei innervation

A

Deep branch of ulnar nerve (C8,T1)

PT 504 Anatomy Lab (15 decks)

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