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Anatomy > Forearm Muscles > Flashcards

Forearm Muscles Flashcards

1
Q

Pronator Teres origin

Superficial flexor

A

Humeral head: medial supracondylar ridge

Ulnar head: coronoid process

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2
Q

Pronator teres insertion

Superficial flexor

A

Middle of lateral surface of the radius

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3
Q

Pronator teres innervation and spinal level

Superficial flexor

A

Median C6,7

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4
Q

Pronator teres action

Superficial flexor

A

Pronator forearm; assist forearm flexion

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5
Q

Flexor carpi radialis (FCR) origin

Superficial flexor

A

Medial epicodyle of humerus

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6
Q

Flexor carpi radialis (FCR) insertion

Superficial flexor

A

Base of 2nd (& 3rd) metacarpals

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7
Q

Flexor Carpi Radialis (FCR) innervation and spinal level

Superficial flexor

A

Median C6,7

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8
Q

Flexor Carpi Radialis (FCR) action

Superficial flexor

A

Flexion and radial deviation of hand; assist forearm pronation

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9
Q

Palmaris longus origin

Superficial flexor

A

Medial epicondyle of humerus

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10
Q

Palmaris longus insertion

Superficial flexor

A

Palmar aponeurosis

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11
Q

Palmaris longus innervation and spinal level

Superficial flexor

A

Median C 7,8

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12
Q

Palmaris longus action

Superficial flexor

A

Flex at wrist? , weakly assist elbow flexion

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13
Q

Flexor carpi ulnaris (FCU) origin

Superficial flexor

A

Humeral head: medial epicondyle of humerus

Ulnar head: olecranon and adjacent ulnar shaft

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14
Q

Flexor carpi ulnaris (FCU) insertion

Superficial flexor

A

Pisiform, hook of the base of the hamate, 5th metacarpal

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15
Q

Flexor carpi ulnaris (FCU) innervation and spinal level

Superficial flexor

A

Ulnar C7 C8 T1

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16
Q

Flexor carpi ulnaris (FCU) action

Superficial flexor

A

Flex At wrist ; ulnar deviation of hand

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17
Q

Flexor digitorum superficialis (FDS) origin

A

Humeral-ulnar head: medial epicondyle

Radial head: anterior, upper 1/2 or radius

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18
Q

Flexor digitorum superficialis (FDS) insertion

A

Splits to attach to lateral aspects of base of the middle phalanx of digits 2-5

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19
Q

Flexor digitorum superficialis innervation and spinal level

A

Median C7,8 T1

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20
Q

Flexor digitorum superficialis action

A

Flex middle phalanges at PIP joint; assist MCP flexion and flexion at wrist, weak elbow flexor

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21
Q

Flexor digitorum profundus origin

A

Proximal 2/3 of anteromedial shaft of ulna and interosseous membrane

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22
Q

Flexor digitorum profundus insertion

A

Base of the distal phalanx of digits 2-5

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23
Q

Flexor digitorum profundus innervation and spinal level

A

Radial part: median C8, T1

Ulnar part: ulnar C8, T1

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24
Q

Flexor digitorum profundus action

A

Flex DIP of fingers 2-5; secondary flexor at PIP and MCP joints; assists flexion at the wrist

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25
Q

Flexor pollicis longus origin

A

Middle anterior surface of radius and adjacent interosseous membrane

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26
Q

Flexor pollicis longus insertion

A

Base of distal phalanx of thumb (palmar surface)

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27
Q

Flexor pollicis longus innervation and spinal level

A

Median C7,8

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28
Q

Flexor Pollicis action

A

Flex thumb at CMC, MCP, and IP joint

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29
Q

Pronator quadratus origin

A

Distal 1/4 of the anterior surface of the ulna

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30
Q

Pronator quadratus insertion

A

Distal 1/4 of the anterior surface of the radius

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31
Q

Pronator quadratus innervation and spinal level

A

Median C7,8

32
Q

Pronator quadratus action

A

Probate forearm, distal radioulnar stabilization

33
Q

Brachioradialis origin

A

Lateral supracondylar ridge, intermuscular septum

34
Q

Brachioradialis insertion

A

Lateral side of distal radius (styloid process)

35
Q

Brachioradialis innervation and spinal level

A

Radial C5,6

36
Q

Brachioradialis action

A

Flex elbow; assist pronation and supination (from extremes of each it will assist in return to neutral)

37
Q

Extensor carpi radialis longus origin

A

Lateral supracondylar ridge, lateral intermuscular septum

38
Q

Extensor carpi radialis longus insertion

A

Dorsum of base of 2nd metacarpal

39
Q

Extensor carpi radialis longus innervation and spinal level

A

Radial C6,7

40
Q

Extensor carpi radialis longus action

A

Extend wrist, radially deviate hand, weak supination

41
Q

Extensor carpi radialis brevis origin

A

Lateral epicondyle of humerus

42
Q

Extensor carpi radialis brevis insertion

A

Dorsum of base of 3rd metacarpal

43
Q

Extensor carpi radialis brevis innervation and spinal level

A

Radial C7,8

44
Q

Extensor carpi radialis brevis action

A

Extend wrist, assist radial deviation of hand

45
Q

Extensor digitorum origin

A

Lateral epicondyle of humerus (via common extensor tendon)

46
Q

Extensor digitorum insertion

A

Extensor expansion of digits 2-5 (to proximal ,middle, and distal phalanges)

47
Q

Extensor digitorum innervation and spinal level

A

Radial C7,8

48
Q

Extensor digitorum action

A

Extend at MCP and IP joints; assist extension at wrist

49
Q

Extensor digit minimi origin

A

Lateral epicondyle of humerus

50
Q

Extensor digitorum minimi insertion

A

Extensor expansion of little finger

51
Q

Extensor digit minimi innervation and spinal level

A

Radial C7,8

52
Q

Extensor digit minimi action

A

Extension at MCP and IP joints of little finger ; weak wrist extension, ulnar deviation and abduction of 5th digit

53
Q

Extensor carpi ulnaris origin

A

Lateral epicondyle of humerus and midshaft of posterior ulna

54
Q

Extensor carpi ulnaris insertion

A

Dorsum of base of 5th metacarpal

55
Q

Extensor carpi ulnaris innervation and spinal level

A

Radial C7,8

56
Q

Extensor carpi ulnaris action

A

Extend and ulnarly deviate hand

57
Q

Supinator origin

A

Lateral epicondyle of humerus, lateral collateral and annular ligaments, supinate crest of ulna (on olecranon)

58
Q

Supinator insertion

A

Lateral and anterior surface of proximal 1/3 of radius

59
Q

Supinator innervation and spinal level

A

Radial C6,7

60
Q

Supinator action

A

Supinate forearm

61
Q

Abductor pollicis longus origin

A

Posterior surfaces of middle 1/3 of radius, ulna, and interosseous membrane

62
Q

Abductor pollicis longus insertion

A

Lateral (radial) side of base of 1st metacarpal

63
Q

Abductor pollicis longus innervation and spinal level

A

Radial C7,8

64
Q

Abductor pollicis longus action

A

Abduct thumb; radially deviate and flex at wrist

65
Q

Extensor pollicis brevis origin

A

Posterior surface of the distal radius, interosseous membrane

66
Q

Extensor pollicis brevis insertion

A

Dorsum of base of proximal phalanx of thumb

67
Q

Extensor pollicis brevis innervation and spinal level

A

Radial C7,8

68
Q

Extensor pollicis brevis action

A

Extend proximal phalanx of 5u,b; assist extension at carpometacarpal joint, assist radial deviation at wrist

69
Q

Extensor pollicis longus origin

A

Middle 1/3 of posterior shaft of ulna and interosseous membrane (just distal to APL)

70
Q

Extensor pollicis longus insertion

A

Dorsum of base of distal phalanx of thumb

71
Q

Extensor pollicis longus innervation and spinal level

A

Radial C7,8

72
Q

Extensor pollicis longus action

A

Extend IP and MCP joints of thumb; assist radial deviation of wrist; CMC adduction; weak wrist extension

73
Q

Extensor Indicus origin

A

Distal shaft of ulna and interosseous membrane

74
Q

Extensor indicus insertion

A

Index finger-within tendon sheath for extensor digitorum (continuous with ED), extensor hood

75
Q

Extensor indicus innervation and spinal level

A

Radial C7,8

76
Q

Extensor indicus action

A

Extends all joints of index finger; assist adduction; weak wrist extension

Anatomy (8 decks)

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