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Human Anatomy > Arm & Forearm > Flashcards

Arm & Forearm Flashcards

1
Q

biceps brachii origin

A

Short head: tip of coracoid process of scapula
Long head: supraglenoid tubercle of scapula

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2
Q

biceps brachii insertion

A

tuberosity of radius & fascia of forearm

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3
Q

biceps brachii innervation

A

Musculotaneous nerve (C5, C6, C7)

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4
Q

biceps brachii action

A

supinates forearm and flexes forearm, short head resists dislocation of shoulder

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5
Q

coracobrachialis origin

A

tip of the coracoid process of scapula

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6
Q

coracobrachalis insertion

A

middle third of medial surface of humerus

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7
Q

coracobrachialis innervation

A

Musculocutaneous nerve (C5, C6, C7)

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8
Q

coracobrachialis action

A

helps flex and adduct arm; resists dislocation of shoulder

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9
Q

brachialis origin

A

distal half of anterior surface of humerus

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10
Q

brachialis insertion

A

coronoid proces and tuberosity ulna

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11
Q

brachialis innervation

A

musculotaneous nerve (C5, C6) and radial nerve (C5, C7)

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12
Q

brachialis action

A

flexes forearm in all positions

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13
Q

triceps brachii origin

A

Long head: infraglenoid tubercle of scapula
Lateral Head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove

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14
Q

triceps brachii insertion

A

proximal end of olecranon of ulna and fascia of forearm

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15
Q

triceps brachii innervation

A

radial nerve (C6, C7, C8)

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16
Q

triceps brachii action

A

chief extensor of forearm; long head resists dislocation of humerus; especially important during adduction

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17
Q

anconeus origin

A

lateral epicondyle of humerus

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18
Q

anconeus insertion

A

lateral surface of olecranon and superior part of posterior surface of ulna

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19
Q

anconeus innervation

A

radial nerve (C7, C8, T1)

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20
Q

anconeus action

A

assists triceps in extending forearm; stabilizes elbow joint; may abduct ulna during pronation

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21
Q

pronator teres (ulnar head) origin

A

coronoid process

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22
Q

pronator teres (ulnar head & humeral head) insertion

A

middle of convexity of lateral surface of radius

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23
Q

pronator teres (ulnar head & humeral head) innervation

A

Median nerve (C6, C7)

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24
Q

pronator teres (ulnar head & Humeral head) action

A

pronates and flexes forearm (at elbow)

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25
Q

pronator teres (humeral head) origin

A

medial epicondyle of humerus

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26
Q

flexor carpi radialis (FCR) origin

A

medial epicondyle of humerus

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27
Q

flexor carpi radialis (FCR) insertion

A

base of 2nd metacarpal

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28
Q

flexor carpi radialis (FCR) innervation

A

median nerve (C6, C7)

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29
Q

flexor carpi radialis (FCR) action

A

flexes and abducts hand (at wrist)

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30
Q

palmaris longus origin

A

medial epicondyle of humerus

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31
Q

palmaris longus insertion

A

distal half of flexor retinaculum and apex of palmar aponeurosis

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32
Q

palmaris longus innervation

A

median nerve (C7, C8)

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33
Q

palmaris longus action

A

flexes hand (at wrist) and tenses palmar aponeurosis

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34
Q

flexor carpi ulnaris (FCU) (humeral head) origin

A

medial epicondyle of humerus

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35
Q

flexor carpi ulnaris (FCU) (ulnar & humeral head) insertion

A

pisiform, hook of hamate, 5th metacarpal

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36
Q

flexor carpi ulnaris (FCU) (ulnar & humeral head) innervation

A

Ulnar nerve (C7, C8)

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37
Q

flexor carpi ulnaris (FCU) (ulnar & humeral head) action

A

flexes and adducts hand (at wrist)

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38
Q

flexor carpi ulnaris (FCU) (ulnar head) origin

A

olecranon and posterior border of ulna (via aponeurosis)

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39
Q

flexor digitorum profundus (FDP) (medial and lateral) origin

A

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

40
Q

flexor digitorum profundus (FDP) (medial) insertion

A

bases of distal phalanges of 4th and 5th digits

41
Q

flexor digitorum profundus (FDP) (medial) innervation

A

ulnar nerve (C8, T1)

42
Q

flexor digitorum profundus (FDP) (medial) action

A

flexes distal phalanges 4 and 5 at distal interphalangeal joints

43
Q

flexor digitorum profundus (FDP) (lateral) insertion

A

bases of distal phalanges of 2nd and 3rd digits

44
Q

flexor digitorum profundus (FDP) (lateral) innervation

A

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

45
Q

flexor digitorum profundus (FDP) (lateral) action

A

flexes distal phalanges 2 and 3 at distal interphalangeal joints

46
Q

flexor pollicis longus (FPL) origin

A

anterior surface of radius and adjacent interosseous membrane

47
Q

flexor pollicis longus (FPL) insertion

A

base of distal phalanx of thumb

48
Q

flexor pollicis longus (FPL) innervation

A

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

49
Q

flexor pollicis longus (FPL) action

A

flexes phalanges of 1st digit (thumb)

50
Q

pronator quadratus origin

A

distal quarter of anterior surface of ulna

51
Q

pronator quadratus insertion

A

distal quarter of anterior surface of radius

52
Q

pronator quadratus innervation

A

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

53
Q

pronator quadratus action

A

pronates forearm; deep fibers bind radius and ulna together

54
Q

brachioradialis origin

A

proximal two thirds of supra-epicondylar ridge of humerus

55
Q

brachioradialis insertion

A

radial styloid process

56
Q

brachioradialis innervation

A

radial nerve (C5, C6, C7)

57
Q

brachioradialis action

A

relatively weak flexion of forearm; maximal when forearm is in midpronated position

58
Q

extensor carpi radialis longus origin

A

lateral supra-epicondylar ridge of humerus

59
Q

extensor carpi radialis longus insertion

A

dorsal base of 2nd metacarpal bone

60
Q

extensor carpi radialis longus innervation

A

radial nerve (C6, C7)

61
Q

extensor carpi radialis longus action

A

extend and abduct hand at wrist joint; active during fist clenching

62
Q

extensor carpi radialis brevis origin

A

lateral epicondyle of humerus

63
Q

extensor carpi radialis brevis insertion

A

dorsal aspect of base of 3rd metacarpal

64
Q

extensor carpi radialis brevis innervation

A

deep branch of radial nerve (C7, C8)

65
Q

extensor carpi radialis brevis action

A

extend and abduct hand at wrist joint; active during fist clenching

66
Q

extensor digitorum origin

A

lateral epicondyle of humerus

67
Q

extensor digitorum insertion

A

extensor expansions of medial 4 digits

68
Q

extensor digitorum innervation

A

deep branch of radial nerve (C7, C8)

69
Q

extensor digitorum action

A

extends medial four digits primarily at metacarpophalangeal joints, secondarily at interphalangeal joints

70
Q

extensor digitorum minimi origin

A

lateral epicondyle of humerus

71
Q

extensor digitorum minimi insertion

A

extensor expansion of 5th digit

72
Q

extensor digitorum minimi innervation

A

deep branch of radial nerve (C7, C8)

73
Q

extensor digitorum minimi action

A

extends 5th digit primarily at metacarpophalangeal joint, secondarily at interphalangeal joint

74
Q

extensor carpi ulnaris origin

A

lateral epicondyle of humerus; posterior border of ulna via a shared aponeurosis

75
Q

extensor carpi ulnaris insertion

A

dorsal aspect of base of 5th metacarpal

76
Q

extensor carpi ulnaris innervation

A

deep branch of radial nerve (C7, C8)

77
Q

extensor carpi ulnaris action

A

extends and adducts hand at wrist joint (also active during first clenching)

78
Q

supinator origin

A

lateral epicondyle of humerus; radial collateral anular ligaments, supinator fossa; crest of ulna

79
Q

supinator insertion

A

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

80
Q

supinator innervation

A

deep branch of radial nerve (C7, C8)

81
Q

supinator action

A

supinates forearm, rotates radius to turn palm anteriorly or superiorly

82
Q

extensor indicis origin

A

posterior surface of distal third of ulna and interosseous membrane

83
Q

extensor indicis insertion

A

extensor expansion of 2nd digit

84
Q

extensor indicis innervation

A

posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

85
Q

extensor indicis action

A

extends 2nd digit (enabling its independent extension); helps extend hand at wrist

86
Q

Abductor pollicis longus origin

A

middle one-third of the posterior surface of the radius and ulna; the interosseous membrane

87
Q

Abductor pollicis longus insertion

A

base of 1st metacarpal

88
Q

Abductor pollicis longus innervation

A

posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

89
Q

Abductor pollicis longus action

A

abducts thumb and extends it at carpometacarpal joint

90
Q

extensor pollicis longus origin

A

posterior surface of middle third of ulna and interosseous membrane

91
Q

extensor pollicis longus insertion

A

dorsal aspect of base of distal phalanx of thumb

92
Q

extensor pollicis longus innervation

A

posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

93
Q

extensor pollicis longus action

A

extends distal phalanx of thumb at interphalangeal joint; extends metacarpophalangeal joint carpometacarpal joint

94
Q

extensor pollicis brevis origin

A

posterior surface of distal third of radius and interosseous membrane

95
Q

extensor pollicis brevis insertion

A

dorsal aspect of base of proximal phalanx of thumb

96
Q

extensor pollicis brevis innervation

A

posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve

97
Q

extensor pollicis brevis action

A

extends proximal phalanx of thumb at metacarpophalangeal joint; extends carpometacarpal joint

Human Anatomy (16 decks)

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