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PHTH 510 > Muscles of the Forearm > Flashcards

Muscles of the Forearm Flashcards

1
Q

what is the origin of coracobrachialis?

A

coracoid process

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1
Q

what is the insertion of coracobrachialis?

A

mid shaft of humerus on antero-medial surface

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2
Q

what is the innervation of coracobrachialis?

A

musculocutaneous nerve

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3
Q

what is the action of coracobrachialis?

A

adduction and flexion of the arm

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4
Q

what is the origin of the brachialis

A

the anterior distal half of the humerus

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5
Q

what is the insertion of brachialis

A

the tuberosity of the ulna

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6
Q

what is the innervation of the brachialis

A

musculocutaneous nerve

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7
Q

what is the action of the brachialis

A

flexion of the forearm

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8
Q

what is the most powerful flexor?

A

the brachialis muscle because it only acts across one joint

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9
Q

what is the origin of the biceps brachii

A

the long head originates at the supraglenoid tubercle of the scapula.
the short head originates at the coracoid process.

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10
Q

what is the insertion of biceps brachii

A

radial tuberosity

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11
Q

what is the innervation of the biceps brachii

A

musculocutaneous nerve

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12
Q

what is the action of the biceps brachii

A

flexion and supination of forearm

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13
Q

what is the origin of the triceps brachii

A

Long head: infraglenoid tubercle
Lateral head: posterior surface of humerus
medial head: posterior surface of humerus

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14
Q

what is the insertion of the triceps brachii

A

olecrannon

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15
Q

what is the innervation of the triceps brachii

A

radial nerve

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16
Q

what is the action of the triceps brachii

A

extension of the forearm and the long head can also extend and adduct the arm

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17
Q

what is the origin of flexor carpi ulnaris?

A

medial epicondyle and olecranon

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18
Q

what is the insertion of flexor carpi ulnaris?

A

pisiform, hamate, and 5th metacarpal

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19
Q

what is the innervation of flexor carpi ulnaris

A

ulnar nerve (C7,C8)

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20
Q

what is the action of flexor carpi ulnaris

A

flex and adduct the wrist (ulnar deviation)

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21
Q

what is the origin of palmaris longus

A

medial epicondyle

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22
Q

what is the insertion of palmaris longus

A

palmar aponeurosis and flexor retinaculum

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23
Q

what is the innervation of palmaris longus

A

median nerve

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24
Q

what is the action of palmaris longus

A

flexes the wrist and tense the palmar aponeurosis

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25
Q

what test can you do to see if you have a palmaris longus

A

shaeffers test. palmaris longus is absent in about 15% of people

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26
Q

what is the origin of flexor carpi radialis

A

medial epicondyle

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27
Q

what is the insertion of flexor carpi radialis

A

base of metacarpal II and III

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28
Q

what is the innervation of flexor carpi radialis

A

median nerve

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29
Q

what is the action of flexor carpi radialis

A

flexed and abduct the wrist

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30
Q

what is the origin of pronator teres

A

medial epicondyle and coronoid process

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31
Q

what is the insertion of pronator teres

A

lateral surface mid shaft of radius

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32
Q

what is the innervation of pronator teres

A

median nerve

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33
Q

what is the action of pronator teres

A

pronation

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34
Q

what is the origin of the flexor digitorum superficialis

A

medial epicondyle and margin of coronoid process; oblique line of radius

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35
Q

what is the insertion of flexor digitorum superficialis

A

middle phalanges of the index, middle, ring, and little fingers

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36
Q

what is the innervation of flexor digitorum superficialis

A

median nerve

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37
Q

what is the action of flexor digitorum superficialis

A

flex the wrist, flex the middle and proximal phalanges of digits 2-5

38
Q

what is the origin of flexor digitorum profundus

A

anterior and medial surface of ulna and interosseus membrane

39
Q

what is the insertion of flexor digitorum profundus

A

distal phalanges of the index, middle, ring, and little fingers

40
Q

what is the innervation of flexor digitorum profundus

A

interosseus branch od the medial and ulnar nerves

41
Q

what is the action of the flexor digitorum profundus

A

flex the distal interphalangeal joints

42
Q

what is the origin of flexor pollicis longus

A

anterior surface of radius and interosseus membrane

43
Q

what is the insertion of flexor pollicis longus

A

base of distal phalanx of the thumb

44
Q

what is the innervation of flexor pollicis longus

A

median nerve

45
Q

what is the action of flexor pollicis longus

A

flexes the distal phalanx of the thumb

46
Q

what is the origin of pronator quadratus

A

distal fourth of anterior surface of the ulna

47
Q

what is the insertion of pronator quadratus

A

distal fourth of the anterior surface of the radius

48
Q

what is the innervation of pronator quadratus

A

anterior interosseus

49
Q

what is the origin of brachioradialis

A

lateral supracondylar ridge

50
Q

what is the insertion of brachiradialis

A

lateral side of the base of the styloid process of the radius

51
Q

what innervates the brachioradialis

A

radial nerve

52
Q

what is the action of the brachioradialis

A

flex the forearm at the elbow

53
Q

what is the origin of extensor carpi radialis longus

A

lateral Supracondylar ridge

54
Q

what is the insertion of extensor carpi radialis longus

A

base of metacarpal II

55
Q

what is the innervation of extensor carpi radialis longus

A

radial nerve

56
Q

what is the innervation of extensor carpi radialis longus

A

radial nerve

57
Q

what is the action of extensor carpi radialis longus

A

extend and abduct the wrist

58
Q

what is the origin of extensor carpi radialis brevis

A

lateral epicondyle

59
Q

what is the insertion of extensor carpi radialis brevis

A

base of metacarpal III

60
Q

what is the innervation of extensor carpi radialis brevis

A

deep branch of the radial nerve

61
Q

what is the origin of extensor digitorum

A

lateral epicondyle

62
Q

what is the insertion of extensor digitorum

A

base of middle and phalanges of index, middle, ring, and little fingers

63
Q

what innervates extensor digitorum

A

posterior interosseus

64
Q

what is the action of extensor digitorum

A

extends the index, middle, ring, and little finger

65
Q

what is the origin of extensor digiti minimi

A

lateral epicondyle

66
Q

what is the insertion of extensor digiti minimi

A

dorsal digital expansion on the 1st phalanx of the little finger

67
Q

what is the innervation of extensor digiti minimi

A

posterior interosseus

68
Q

what is the action of extensor digiti minimi

A

extend the little finger

69
Q

what is the origin of extensor carpi ulnaris

A

lateral epicondyle and posterior border of ulna

70
Q

what is the insertion extensor carpi ulnaris

A

tubercle on the base of the medial side of metacarpal V

71
Q

what is the innervation of extensor carpi ulnaris

A

posterior interosseus

72
Q

what is the action of extensor carpi ulnaris

A

extend and adduct the wrist

73
Q

what is the origin of anconeus

A

lateral epicondyle

74
Q

what is the insertion of anconeus

A

olecranon process an proximal posterior surface of ulna

75
Q

what is the innervation of anconeus

A

radial nerve

76
Q

what is the action of anconeus

A

abduct the ulna in pronation to maintain the center of the palm over the same point when the hand is flipped. it is an accessory extensor of the elbow joint.

77
Q

what is the origin of supinator

A

superior-lateral epicondyle
deep- superior crest of ulna

78
Q

what is the insertion of supinator

A

the lateral surface of radius superior to the anterior oblique line

79
Q

what is the innervation of supinator

A

posterior interosseus

80
Q

what is the origin of abductor pollicis longus

A

posterior surface of ulna and radius and interosseus membrane

81
Q

what is the insertion of abductor pollicis longus

A

lateral side of base of metacarpal I

82
Q

what is the innervation of abductor pollicis longus

A

posterior interosseus

83
Q

what is the action of abductor pollicis longus

A

abduct CMC joint of thumb

84
Q

what is the origin of extensor pollicis brevis

A

posterior surface of radius and interosseus membrane

85
Q

what is the insertion of extensor pollicis brevis

A

dorsal surface of base of proximal phalanx of the thumb

86
Q

what is the action of extensor pollicis brevis

A

extension of the thumb and adduction of the wrist

87
Q

what is the origin of extensor pollicis longus

A

posterior surface of ulna and interosseus membrane

88
Q

what is the insertion of extensor pollicis longus

A

dorsal surface of base of distal phalanx of thumb

89
Q

what is the origin of extensor indicis

A

posterior surface of ulna and interosseus membrane

90
Q

what is the insertion of extensor indicis

A

extensor hood of index finger

91
Q

what is the innervation of extensor indicis

A

posterior interosseus

92
Q

what is the action of extensor indicis

A

extension of the wrist and joints of the second digit

PHTH 510 (7 decks)

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