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Gross Anatomy > Forearm > Flashcards

Forearm Flashcards

1
Q

Brachioradialis insertion

A

Styloid process of the radius

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2
Q

Brachioradialis innervation

A

Radial n. C5-C6

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3
Q

Brachioradialis action

A

Elbow: flexion
Forearm: semipronation

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4
Q

Extensor carpi radialis longus origin

A

Lateral supracondylar ridge of distal humerus; lateral intermuscular septum

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5
Q

Extensor carpi radialis longus insertion

A

2nd metacarpal (base)

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6
Q

Extensor carpi radialis longus innervation

A

Radial n. C6-C7

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7
Q

Extensor carpi radialis longus and brevis action

A

Elbow: weak flexion
Wrist: extension and abduction

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8
Q

Extensor carpi radialis brevis origin

A

Lateral epicondyle of humerus

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9
Q

Extensor carpi radialis brevis insertion

A

3rd metacarpal (base)

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10
Q

Extensor carpi radialis brevis innervation

A

Radial n. C7-C8

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11
Q

Extensor digitorum and extensor digiti minimi origin

A

Common head (lateral epicondyle of humerus)

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12
Q

Extensor digitorum insertion

A

Dorsal digital expansion of 2nd to 5th digits

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13
Q

Extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris innervation

A

Posterior interosseous branch of radial nerve C7-C8

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14
Q

Extensor digitorum action

A

Wrist: extension
MCP, PIP, and DIP of 2nd to 5th digits;
Extension/abduction of fingers

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15
Q

Extensor digiti minimi insertion

A

Dorsal digital expansion of 5th metacarpal

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16
Q

Extensor digiti minimi action

A

Wrist: extension, ulnar abduction of hand
MCP, PIP, and DIP of 5th digit:
Extension and abduction of 5th digit

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17
Q

Extensor carpi ulnaris origin

A 
Common head (lateral epicondyle of humerus)
Ulnar head (dorsal surface)
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18
Q

Extensor carpi ulnaris insertion

A

Base of 5th metacarpal

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19
Q

Extensor carpi ulnaris action

A

Wrist: extension, adduction (ulnar deviation) of hand

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20
Q

Brachioradialis origin

A

Distal humerus (distal surface); lateral intermuscular septum

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21
Q

Supinator origin

A

Olecranon, lat. epicondyle of humerus, radial collateral ligament, annular ligament of radius

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22
Q

Supinator insertion

A

Radius (between radial tuberosity and insertion of pronator teres)

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23
Q

Supinator innervation

A

Posterior interosseous branch of radial nerve C6-C7

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24
Q

Supinator action

A

Radioulnar joints: supination

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25
Q

Abductor pollicus longus origin

A

Radius and ulna( dorsal surfaces, interosseous membrane)

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26
Q

Abductor pollicus longus insertion

A

Base of 1st metacarpal

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27
Q

Abductor pollicus longus, extensor pollicus brevis, extensor pollicus longus, extensor indicis innervation

A

Posterior interosseous branch of the radial nerve C7-C8

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28
Q

Abductor pollicus longus action

A

Radiocarpal joint: abduction of the hand

Carpometacarpal joint of thumb; abduction

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29
Q

Extensor pollicus brevis origin

A

Radius (posterior surface) and interosseous membrane

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30
Q

Extensor pollicus brevis insertion

A

Base of proximal phalanx of thumb

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31
Q

Extensor pollicus brevis action

A

Radio carpal joint: abduction (radial deviation) of hand

Carpometacarpal and MCP or thumb; extension

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32
Q

Extensor pollicus longus origin

A

Ulna (posterior surface) and interosseous membrane

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33
Q

Extensor pollicus longus insertion

A

Base of distal phalanx of thumb

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34
Q

Extensor pollicus longus action

A

Wrist: extension and abduction (radial deviation) of hand

Carpometacarpal of thumb; adduction MCP and IP of thumb: extension

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35
Q

Extensor indicis origin

A

Ulna (posterior surface) and interosseous membrane

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36
Q

Extensor indicis insertion

A

Posterior digital extension of 2nd digit

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37
Q

Extensor Indicis action

A

Wrist:extension

MCP, PIP, and DIP of 2nd digit; extension

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38
Q

Pronator teres origin

A

Humeral head: medial epicondyle of humerus

Ulnar head: coronoid process

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39
Q

Pronator teres insertion

A

Lateral radius (distal to supinator insertion)

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40
Q

Pronator teres, flexor carpi radialis innervation

A

Median n. C6-C7

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41
Q

Pronator teres action

A

Elbow: weak flexor
Forearm: pronation

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42
Q

Flexor carpi radialis origin

A

Medial epicondyle of humerus

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43
Q

Flexor carpi radialis insertion

A

Base of 2nd metacarpal (variance: base of 3rd metacarpal)

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44
Q

Flexor carpi radialis action

A

Wrist: flexion and abduction (radial deviation) of hand

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45
Q

Palmaris longus origin

A

Medial epicondyle of humerus

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46
Q

Palmaris longus insertion

A

Palmar aponeurosis

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47
Q

Palmaris longus innervation

A

Median n C7-C8

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48
Q

Palmaris longus action

A

Elbow: weak flexion
Wrist: flexion tightens palmar aponeurosis

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49
Q

Flexor carpi ulnaris origin

A

Humeral head: medial epicondyle

Ulnar head: olecranon

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50
Q

Flexor carpi ulnaris insertion

A

Pisiform; hook of hamate; base of 5th metacarpal

51
Q

Flexor carpi ulnaris innervation

A

Ulnar n. C7-T1

52
Q

Flexor carpi ulnaris action

A

Wrist: flexion and adduction (ulnar deviation ) of hand

53
Q

Flexor digitorum superficialis origin

A

Humeral-ulnar head: medial epicondyle of humerus

Radial head: upper half of anterior border of radius

54
Q

Flexor digitorum superficialis insertion

A

Sides of middle phalanges of 2nd to 5th digits

55
Q

Flexor digitorum superficialis innervation

A

Median n. C8, T1

56
Q

Flexor digitorum superficialis action

A

Elbow: weak flexor
Wrist: MCP, and PIP joints of 2nd to 5th digits; flexion

57
Q

Flexor digitorum profundus origin

A

Ulna ( proximal 2/3 of flexor surface) and interosseous membrane

58
Q

Flexor digitorum profundus insertion

A

Distal phalanges of 2nd to 5th digits (palmar surface)

59
Q

Flexor digitorum profundus innervation

A

Median n. C8,T1

Ulnar n. C8,T1

60
Q

Flexor digitorum profundus action

A

Wrist, MCP, PIP, and DIP of 2nd to 5th digits; flexion

61
Q

Flexor pollicus longus origin

A

Radius (midanterior surface ) and adjacent interosseous membrane

62
Q

Flexor pollicus longus insertion

A

Distal phalanx of thumb (palmar surface)

63
Q

Flexor pollicus longus and pronator quadratus innervation

A

Median n. C8,T1

64
Q

Flexor pollicus longus action

A

Wrist: flexion and abduction (radial deviation) of hand

Carpometacarpal of thumb; flexion MCP and IP of thumb; flexion

65
Q

Pronator quadratus origin

A

Distal quarter of ulna (anterior surface)

66
Q

Pronator quadratus insertion

A

Distal quarter of radius (anterior surface)

67
Q

Pronator quadratus action

A

Hand: pronation

Distal radioulnar joint: stabilization

68
Q

Adductor pollicus transverse head origin

A

3rd metacarpal ( palmar surface)

69
Q

Adductor pollicus oblique head origin

A

Capitate bone; 2nd and 3rd metacarpals (bases)

70
Q

Adductor pollicus, abductor pollicus brevis, and flexor pollicus brevis insertion

A

Thumb (base of proximal phalanx )
Adductor pollicis: via the ulnar sesamoid
Other two: via the radial sesamoid

71
Q

Adductor pollicis innervation

A

Ulnar n. C8-T1

72
Q

Adductor pollicis action

A

CMC joint of thumb;adduction

MCP joint of thumb; flexion

73
Q

Abductor pollicis brevis origin

A

Scaphoid bone and trapezium; flexor retinaculum

74
Q

Abductor pollicis brevis innervation

A

Median n. C8,T1

75
Q

Abductor pollicis brevis action

A

CMC joint of thumb; abduction

76
Q

Flexor pollicis brevis superficial head origin

A

Flexor retinaculum

77
Q

Flexor pollicis brevis deep head origin

A

Capitate bone, trapezium

78
Q

Flexor pollicis brevis superficial head innervation

A

Median n. C8, T1

79
Q

Flexor pollicis brevis deep head innervation

A

Ulnar n. C8-T1

80
Q

Flexor pollicis brevis action

A

CMC joint of thumb; flexion

81
Q

Opponens pollicis origin

82
Q

Opponens pollicis insertion

A

1st metacarpal (radial border)

83
Q

Opponens pollicis innervation

A

Median n. C8,T1

84
Q

Opponens pollicis action

A

CMC Joint of thumb; opposition

85
Q

Opponens digiti minimi and flexor digiti minimi brevis origin

A

Hook of hamate, flexor retinaculum

86
Q

Opponent digiti minimi insertion

A

5th metacarpal ulnar border

87
Q

Opponens digiti
Flexor digiti minimi brevis
Abductor digiti minimi
Palmaris brevis

Innervation

A

Ulnar n. C8-T1

88
Q

Opponens digiti minimi action

A

Draws metacarpal in palmar direction (opposition )

89
Q

Flexor digiti minimi brevis insertion

A

5th proximal phalanx (base)

90
Q

Flexor digiti minimi brevis action

A

MCP joint of little finger; flexion

91
Q

Abductor digiti minimi origin

A

Pisiform bone

92
Q

Abductor digiti minimi insertion

A

5th proximal phalanx (ulnar base) and dorsal digital expansion of 5th digit

93
Q

Abductor digiti minimi action

A

MCP joint of little finger; flexion and abduction of little finger
PIP and DIP joints of little finger; extension

94
Q

Palmaris brevis origin

A

Palmar aponeurosis (ulnar border)

95
Q

Palmaris brevis insertion

A

Skin of hypothenar eminence

96
Q

Palmaris brevis action

A

Tightens the palmar aponeurosis (protective function)

97
Q

1st and 2nd lumbricals origin

A

Tendons of flexor digitorum profundus radial sides

98
Q

1st lumbricals insertion

A

2nd digit dde

99
Q

2nd lumbrical insertion

A

3rd digit dde

100
Q

1st/2nd lumbricals innervation

A

Median n. C8-T1

101
Q

Lumbricals action

A

2nd to 5th digits:
MCP joints; flexion
Proximal and distal IP joints; extension

102
Q

3rd/4th lumbricals origin

A

Tendons of flexor digitorum profundus (biennale from medial and lateral sides)

103
Q

3rd lumbrical insertion

A

4th digit dde

104
Q

4th lumbrical insertion

A

5th digit dde

105
Q

3rd/4th lumbrical innervation

A

Ulnar n. C8-T1

106
Q

Dorsal interossei innervation

A

Ulnar n. C8-T1

107
Q

1st Dorsal interossei origin

A

1st and 2nd metacarpals (adj sides, two heads)

108
Q

1st dorsal interossei insertion

A

2nd digit dde

2nd proximal phalanx radial side

109
Q

Dorsal interossei action

A

2nd to 4th digits:
MCP joints; flexion
Proximal and distal IP joints ;
Extension and abduction from 3rd digit

110
Q

2nd dorsal interossei origin

A

2nd and 3rd metacarpals (adj sides two heads)

111
Q

2nd dorsal interossei insertion

A

3rd digit dde

3rd proximal phalanx radial side

112
Q

3rd dorsal interossei origin

A

3rd and 4th metacarpals (adj sides two heads)

113
Q

3rd dorsal interossei insertion

A

3rd digit dde

3rd proximal phalanx ulnar side

114
Q

4th dorsal interossei origin

A

4th and 5th metacarpals (adj sides two heads)

115
Q

4th dorsal interossei insertion

A

4th digit dde

4th proximal phalanx ulnar side

116
Q

Palmar interossei innervation

A

Ulnar n. C8-T1

117
Q

Palmar interossei action

A

2nd, 4th and 5th digits:
MCP joints; flexion
Proximal and distal IP joints
Extension and adduction toward 3rd digit

118
Q

1st palmar interossei origin

A

2nd metacarpal ulnar side

119
Q

1st palmar interossei insertion

A

2nd digit dde

2nd proximal phalanx base

120
Q

2nd palmar interossei origin

A

4th metacarpal radial side

121
Q

2nd Palmar interossei insertion

A

4th digit dde

4th proximal phalanx base

122
Q

3rd palmar interossei origin

A

5th metacarpal radial side

123
Q

3rd palmar interossei insertion

A

5th digit dde

5th proximal phalanx base

Gross Anatomy (9 decks)

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