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Dorsal Forearm And Hand > Muscles of forearm and hand > Flashcards

Muscles of forearm and hand Flashcards

0
Q

Brachioradialis insertion

A

Lateral surface of distal end of radius proximal to styloid process

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1
Q

Brachioradialis origin

A

Proximal two thirds of lateral supra-epicondylar ridge

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2
Q

Brachioradialis innervation

A

Radial nerve c5 c6 c7

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3
Q

Brachioradialis action

A

Weak flexion of elbow joint, maximal when forearm is in mid pronated position

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4
Q

Extensor carpi radialis longus origin

A

Lateral supra epicondylar ridge of humerus

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5
Q

Extensor carpi radialis longus insertion

A

Dorsal aspect of 2nd metacarpal

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6
Q

Extensor carpi radialis longus innervation

A

Radial nerve c6 c7

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7
Q

Extensor carpi radialis longus action

A

Extends and abducts wrist joint, extensor carpi radialis brevis active during fist clenching

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8
Q

Extensor carpi radialis brevis origin

A

Lateral epicondyle of humerus common extensor

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9
Q

Extensor carpi radialis brevis insertion

A

Dorsal aspect of base of 3rd metacarpal

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10
Q

Extensor carpi radialis brevis innervation

A

Deep branch of radial nerve C7 C8

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11
Q

Extensor carpi radialis brevis action

A

Extend and abduct wrist joint Extensor carpi radialis brevis active during fist clenching

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12
Q

Extensor digitorum origin

A

Lateral epicondyle of humerus (common extensor origin )

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13
Q

Extensor digitorum insertion

A

Extensor expansion of medial four fingers

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14
Q

Extensor digitorum innervation

A

Posterior interosseous nerve C7 C8 ,continuation of deep branches of radial nerve

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15
Q

Extensor digitorum action

A

Extend wrist

Extend medial four fingers primary metacarphalangeal joints secondarily interphalangeal joints

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16
Q

Extensor digiti minimi origin

A

Lateral epicondyle of humerus ( common extensor origin )

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17
Q

Extensor digiti minimi insertion

A

5th expansion of 5th digit finger

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18
Q

Extensor digiti minimi innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

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19
Q

Extensor digiti minimi action

A

Extends wrist joint
Extends 5th finger
primary metacarphalangeal joints secondarily interphalangeal joints

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20
Q

Extensor carpi ulnaris origin

A

Lateral epicondyle of humerus, posterior border of ulna via shared aponerodis

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21
Q

Extensor carpi ulnaris insertion

A

Dorsal aspect of base of 5th metacarpal

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22
Q

Extensor carpi ulnaris innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

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23
Q

Extensor carpi ulnaris action

A

Extends and Adducts wurst joint, also active during wrist clenching

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24
Q

Abductor pollicis longus orgin

A

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

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25
Q

Abductor pollicis longus insertion

A

Base of 1st metacarpal

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26
Q

Abductor pollicis longus innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

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27
Q

Abductor pollicis longus action

A

Extends wrist

Abducts thumb and extends it at carpi metacarpal joint

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28
Q

Extensor pollicis longus orgin

A

Posterior surface of middle 3rd of ulna and interosseous membrane

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29
Q

Extensor pollicis longus insertion

A

Dorsal aspect of base of distal phalanx thumb

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30
Q

Extensor pollicis longus innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

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31
Q

Extensor pollicis longus action

A

Extends wrist
Extends distal phalanx of thumb at interphalangeal joint
Extends metacarpophalangeal and carpometacarpAl joints

32
Q

Extensor pollicis brevis orgin

A

Posterior surface of distal 3rd of radius and interosseous membrane

33
Q

Extensor pollicis brevis insertion

A

Dorsal aspect of base of proximal phalanx of thumb

34
Q

Extensor pollicis brevis innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

35
Q

Extensor pollicis brevis action

A

Extends wrist
Extends proximal phalanx of thumb at metacarpophalangeal joint
Extends carpometacarpal joint

36
Q

Extensor indicis orgin

A

Posterior surface of distal 3rd ulna and interosseous membrane

37
Q

Extensor indicis insertion

A

Extensor expansion of 2nd finger

38
Q

Extensor indicis innervation

A

Posterior interosseous nerve C7 C8, continuation of deep branch of radial nerve

39
Q

Extensor indicis action

A

Extends joint
Extends 2nd finger ( enabling its independent expansion )
Helps extend hand at wrist

40
Q

Supinator orgin

A

Later epicondyle of humerus , radial collateral and anular ligaments supinator fossa , crest of ulna

41
Q

Supinator insertion

A

Lateral posterior and anterior anterior surfaces of proximal third of radius

42
Q

Supinator innervation

A

Deep branch of radial nerve C7 C8

43
Q

Supinator action

A

Supinates forearm , rotates radius to turn palm anteriorly ( if Elbow is flexed )

44
Q

Pronator teres (pt) orgin

A

Ulnar head: coronoid process of ulna

Humeral head: medial epicondyle of humerus

45
Q

Pronator teres (pt) insertion

A

Middle of convexity of lateral surface radius

46
Q

Pronator teres (pt) innervation

A

Median nerve C6 C7

47
Q

Pronator teres (pt) action

A

Pronates and flexes forearm

48
Q

Flexor carpi radialis (FCR) orgin

A

Medial epicondyle of humerus

49
Q

Flexor carpi radialis (FCR) insertion

A

Base of 2nd and 3rd metacarpal

50
Q

Flexor carpi radialis (FCR) innervation

A

Median nerve C6 C7

51
Q

Flexor carpi radialis (FCR) action

A

Flexes and abducts hand and wrist

52
Q

Palmaris longus orgin

A

Medial epicondyle of humerus

53
Q

Palmaris longus insertion

A

Distal half of flexor retinaculum, palmar aponeurosis

54
Q

Palmaris longus innervation

A

Median nerve C7 C8

55
Q

Palmaris longus action

A

Flexes hand at wrist and tenses palmar aponeurosis

56
Q

Superficial first layer

A

PronTor teres PT
Flexor carpi radialis FCR
Palmaris longus

57
Q

Intermediate second layer

A

Flexor digitorum superficialis (FDS)

58
Q

Flexor digitorum superficialis orgin

A

Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
Radial head: oblique line of radius

59
Q

Flexor digitorum superficialis insertion

A

Shafts ( bodies ) of middle phalanges of medial four digits

60
Q

Flexor digitorum superficialis innervation

A

Median nerve C7 C8 T1

61
Q

Flexor digitorum superficialis action

A

Flexes wrist
Flexes proximal interphalangeal joints of middle four digits
, acting more strongly, it also flexes proximal phalanges at metacarpophalangeal langeal joints

62
Q

Flexor carpi ulnaris
Humeral head
Ulnar head orgin

A

Olecranon and posterior border of ulna ( via aponeurosis

63
Q

Flexor carpi ulnaris insertion

A

Pisiform, hook of hamate, and 5th metacarpal

64
Q

Flexor carpi ulnaris innervation

A

Ulnar nerve C7 C8

65
Q

Flexor carpi ulnaris action

A

Flexes and Adducts hand at wrist

66
Q

Flexor pollicis longus orgin

A

Anterior surface of radius and adjacent interosseous membrane

67
Q

Flexor pollicis longus insertion

A

Base of distal phalanx of thumb

68
Q

Flexor pollicis longus innervation

A

Anterior interosseous nerve from median nerve C8 T1

69
Q

Flexor pollicis longus action

A

Flexes wrist

Flexes metacarpophalangeal and interphalangeal joints of thumb

70
Q

Flexor digitorum profundus orgin

A

Proximal 3 quarters of medial medial and anterior surfaces of ulna and interosseous membrane

71
Q

Flexor digitorum profundus insertion

A

Bases of distal phalanges if 2nd 3rd and 4th and 5th digits

72
Q

Flexor digitorum profundus innervation

A 
lateral part (to digits 2 and 3) 
Median nerve C8 T1
( Anterior interosseous branch )
Medial part ( to digits 4 and 5)
Ulnar nerve ( C8 T1)
73
Q

Flexor digitorum profundus action

A

Flexes wrist joint
Flexes distal interphalangeal joints of digits 2, 3, 4, and 5
Assists with wrist flexion

74
Q

Pronator quadrates orgin

A

Distal quarter of Anterior surface of ulna

75
Q

Pronator quadrates insertion

A

Distal quarter of anterior surface radius

76
Q

Pronator quadrates innervation

A

Anterior interosseous nerve from median nerve C8 T1

77
Q

Pronator quadrates action

A

Pronates forearm, deep fibers bind radius and ulna together

Dorsal Forearm And Hand (1 decks)

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