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Gross Anatomy > Hand > Flashcards

Hand Flashcards

0
Q

Insertion of opponens pollicis

A

Lateral side of 1st metacarpal

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1
Q

Origin of opponens pollicis

A

Flexor retinaculum

Tubercles of scaphoid and trapezium

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2
Q

Innervation of opponens pollicis

A

Recurrent branch of median nerve C8, T1

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3
Q

Action of opponens pollicis

A

To oppose thumb

It draws 1st metacarpal medially to center of palm and rotates it medially

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5
Q

Muscles that originate from:
Flexor retinaculum
And
Tubercles of scaphoid and trapezium

A

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

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6
Q

Origin of opponens pollicis

A

Flexor retinaculum

Tubercles of scaphoid and trapezium

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7
Q

Insertion of opponens pollicis

A

Lateral side of 1st metacarpal

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8
Q

Muscles innervated by recurrent branch of median nerve C8,T1

A

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

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9
Q

Muscle innervated by deep branch of ulnar nerve C8,T1

A 
Adductor pollicis 
Abductor digiti minimi
Flexor digit minimi brevis
Opponens digit minimi 
Lumbrical 3 and 4
Dorsal interossei 1-4
Palmar interossei 1-3
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10
Q

Origin of adductor pollicis oblique head

A

Base of 2nd and 3rd metacarpal
Capitate
Adjacent carpals

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11
Q

Origin of adductor pollicis transverse head

A

Anterior surface of shaft of 3rd metacarpal

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12
Q

Muscles that insertion on the medial side of base of proximal phalanx of 5th finger

A

Abductor digit minimi

Flexor digiti minimi brevis

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13
Q

Muscles that originate on the flexor retinaculum and hook of hamate

A

Flexor digiti minimi

Opponens digit minimi

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14
Q

Origin of pronator teres

A

Ulnar head: coronoid process

Humeral head: medial epicondyle

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15
Q

Insertion of pronator teres

A

Middle of convexity of lateral surface of radius

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16
Q

Innervation of pronator teres

A

Median nerve C6,C7

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17
Q

Action of pronator teres

A

Pronation and flexion of forearm

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18
Q

Origin of flexor Carpi Radialis

A

Medial epicondyle

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19
Q

Insertion of flexor Carpi Radialis

A

Base of 2nd metacarpa

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20
Q

Innervation of flexor Carpi Radialis

A

Median nerve C6,C7

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21
Q

Action of flexor Carpi Radialis

A

Flexion and radial deviation

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22
Q

Origin of palmaris longus

A

Medial epicondyle

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23
Q

Insertion of palmaris longus

A

Distal half of flexor retinaculum

Palmar aponeurosis

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24
Q

Innervation of palmaris longus

A

Median nerve C7,C8

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25
Q

Action of palmaris longus

A

Flexes wrist and tenses palmar aponeurosis

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26
Q

Origin of flexor Carpi ulnaris

A

Olecranon

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27
Q

Insertion of flexor Carpi ulnaris

A

Pisiform
Hook of hamate
5th metacarpal

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28
Q

Innervation of flexor Carpi ulnaris

A

Ulnar nerve C7,C8

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29
Q

Action of flexor Carpi ulnaris

A

Flexion

Ulnar deviation

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30
Q

Origin of flexor digitorum superficialis

A

Humero-ulnar head: medial epicondyle & coronoid process

Radial head: oblique line of radius

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31
Q

Insertion of flexor digitorum superficialis

A

Shafts of middle phalanges of digits 2-5

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32
Q

Innervation of flexor digitorum superficialis

A

Median nerve C7,C8,T1

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33
Q

Action of flexor digitorum superficialis

A

Flexes proximal interphalangeal joints of digits 2-5

Acting more strongly, flexes proximal phalanges at metacarpophalangeal joint

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34
Q

Origin of flexor digitorum profundus

A

Proximal 3/4 of anterior and medial surfaces of ulna

Interosseus membrane

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35
Q

Insertion of flexor digitorum profundus

A

Bases of distal phalanges of digits 2-5

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36
Q

Innervation of flexor digitorum profundus

A

Digits 2&3: median nerve C8,T1

Digits 4&5: ulnar nerve C8,T1

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37
Q

Action of flexor digitorum profundus

A

Flexes distal interphalangeal joints of digits 2-5

Assist with wrist flexion

38
Q

Origin of flexor pollicis longus

A

Anterior surface of radius

And adjacent interosseus membrane

39
Q

Insertion of flexor pollicis longus

A

Base of distal phalanx of thumb

40
Q

Innervation of flexor pollicis longus

A

Anterior interosseus nerve from median nerve C8,T1

41
Q

Action of flexor pollicis longus

A

Flexes thumb

42
Q

Origin of pronator quadratus

A

Distal quarter of anterior surface of ulna

43
Q

Insertion of pronator quadratus

A

Distal quarter of anterior surface of radius

44
Q

Innervation of pronator quadratus

A

Anterior interosseus from median nerve C8,T1

45
Q

Action of pronator quadratus

A

Pronates forearm

Binds ulna and radius together

46
Q

Insertion of brachioradialis

A

Lateral surface of distal end of radius

Proximal to styled process

47
Q

Innervation of brachioradialis

A

Radial nerve C5,C6,C7

48
Q

Action of brachioradialis

A

Relatively weak flexion of forearm

Maximal when forearm is in midpronated position

49
Q

Origin of extensor Carpi Radialis longus

A

Lateral supra-epicondylar ridge

50
Q

Insertion of extensor Carpi Radialis longus

A

Dorsal aspect of base of 2nd metacarpal

51
Q

Innervation of extensor Carpi Radialis longus

A

Radial nerve C6,C7

52
Q

Action of extensor Carpi Radialis longus

A

Extends wrist

Radial deviation

53
Q

Origin of extensor Carpi radial brevis

A

Lateral epicondyle

54
Q

Insertion of extensor Carpi Radialis brevis

A

Dorsal aspect of base of 3rd metacarpal

55
Q

Innervation of extensor Carpi Radialis brevis

A

Deep branch of radial nerve C7,C8

56
Q

Action of extensor Carpi Radialis brevis

A

Extends hand
Radial deviation
Active during fist clenching

57
Q

Origin of extensor digitorum

A

Lateral epicondyle

58
Q

Insertion of extensor digitorum

A

Extensor expansion of medial 4 fingers

59
Q

Innervation of extensor digitorum

A

Posterior interosseus nerve C7,C8

Continuation of deep branch of radial nerve

60
Q

Action of extensor digitorum

A

Extend medial 4 fingers
Primarily at metacarpophalangeal joints
Secondarily at interphalangeal joints

61
Q

Origin of extensor digit minimi

A

Lateral epicondyle

62
Q

Insertion of extensor digiti minimi

A

Extensor expansion of 5th finger

63
Q

Innervation of extensor digiti minimi

A

Posterior interosseus nerve C7,C8

Continuation of. Deep branch of radial nerve

64
Q

Action of extensor digit minimi

A

Extends 5th finger
Primarily at metacarpophalangeal joint
Secondarily at interphalangeal joint

65
Q

Origin of extensor Carpi ulnaris

A

Lateral epicondyle

Posterior border of ulna via a shared aponeurosis

66
Q

Insertion of extensor Carpi ulnaris

A

Dorsal aspect of base of 5th metacarpal

67
Q

Innervation of extensor Carpi ulnaris

A

Posterior interosseus nerve C7,C8

Continuation of deep branch of radial nerve

68
Q

Action of extensor Carpi ulnaris

A

Extends hand
Ulnar deviation
Active during fist clenching

69
Q

Origin of supinator

A 
Lateral epicondyle 
Radial collateral ligament
Annular ligament 
Supinator fossa 
Crest of ulna
70
Q

Insertion of supinator

A

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

71
Q

Innervation of supinator

A

Deep branch of radial nerve C7,C8

72
Q

Action of supinator

A

Supinates forearm

Rotates radius to turn palm anteriorly or superiorly (if elbow is flexed)

73
Q

Origin of abductor pollicis longus

A

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

74
Q

Insertion of abductor pollicis longus

A

Base of 1st metacarpal

75
Q

Innervation of abductor pollicis longus

A

Posterior interosseus nerve C7,C8

Continuation of deep branch of radial nerve

76
Q

Action of abductor pollicis longus

A

Abducts thumb

Extends thumb at carpometacarpal joint

77
Q

Origin of extensor pollicis longus

A

Posterior surface of middle third of ulna and interosseus membrane

78
Q

Insertion of extensor pollicis longus

A

Dorsal aspect of base of distal phalanx of thumb

79
Q

Innervation of extensor pollicis longus

A

Posterior interosseus nerve C7,C8

Continuation of deep branch of radial nerve

80
Q

Action of extensor pollicis longus

A

Extends distal phalanx of thumb at interphalangeal joint

Extends metacarpophalangeal and carpometacarpal joints

81
Q

Origin of extensor pollicis brevis

A

Posterior surface of distal third of radius and interosseus membrane

82
Q

Insertion of extensor pollicis brevis

A

Dorsal aspect of base of proximal phalanx of thumb

83
Q

Innervation of extensor pollicis brevis

A

Posterior interosseous nerve C7,C8

Continuation of deep branch of radial nerve

84
Q

Action of extensor pollicis brevis

A

Extends proximal phalanx of thumb at metacarpophalangeal joint
Extends carpometacarpal joint

85
Q

Origin of extensor indicis

A

Posterior surface of distal third of ulna and interosseous membrane

86
Q

Insertion of extensor indicis

A

Extensor expansion if 2nd finger

87
Q

Innervation of extensor indicis

A

Posterior interosseous nerve C7,C8

Continuation of deep branch of radial nerve

88
Q

Action of extensor indicis

A

Extends 2nd finger
(Enabling its independent extension)
Helps extend hand at wrist

91
Q

Name the thenar muscles

A

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis
Adductor pollicis

134
Q

Origin of brachioradialis

A

Proximal two thirds of lateral supra-epicondylar ridge

Gross Anatomy (8 decks)

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