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Flashcards in Hand Deck (90):
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Origin of opponens pollicis

Flexor retinaculum
Tubercles of scaphoid and trapezium

1

Insertion of opponens pollicis

Lateral side of 1st metacarpal

2

Innervation of opponens pollicis

Recurrent branch of median nerve C8, T1

3

Action of opponens pollicis

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

5

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

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

6

Origin of opponens pollicis

Flexor retinaculum
Tubercles of scaphoid and trapezium

7

Insertion of opponens pollicis

Lateral side of 1st metacarpal

8

Muscles innervated by recurrent branch of median nerve C8,T1

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

9

Muscle innervated by deep branch of ulnar nerve C8,T1

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

10

Origin of adductor pollicis oblique head

Base of 2nd and 3rd metacarpal
Capitate
Adjacent carpals

11

Origin of adductor pollicis transverse head

Anterior surface of shaft of 3rd metacarpal

12

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

Abductor digit minimi
Flexor digiti minimi brevis

13

Muscles that originate on the flexor retinaculum and hook of hamate

Flexor digiti minimi
Opponens digit minimi

14

Origin of pronator teres

Ulnar head: coronoid process
Humeral head: medial epicondyle

15

Insertion of pronator teres

Middle of convexity of lateral surface of radius

16

Innervation of pronator teres

Median nerve C6,C7

17

Action of pronator teres

Pronation and flexion of forearm

18

Origin of flexor Carpi Radialis

Medial epicondyle

19

Insertion of flexor Carpi Radialis

Base of 2nd metacarpa

20

Innervation of flexor Carpi Radialis

Median nerve C6,C7

21

Action of flexor Carpi Radialis

Flexion and radial deviation

22

Origin of palmaris longus

Medial epicondyle

23

Insertion of palmaris longus

Distal half of flexor retinaculum
Palmar aponeurosis

24

Innervation of palmaris longus

Median nerve C7,C8

25

Action of palmaris longus

Flexes wrist and tenses palmar aponeurosis

26

Origin of flexor Carpi ulnaris

Olecranon

27

Insertion of flexor Carpi ulnaris

Pisiform
Hook of hamate
5th metacarpal

28

Innervation of flexor Carpi ulnaris

Ulnar nerve C7,C8

29

Action of flexor Carpi ulnaris

Flexion
Ulnar deviation

30

Origin of flexor digitorum superficialis

Humero-ulnar head: medial epicondyle & coronoid process
Radial head: oblique line of radius

31

Insertion of flexor digitorum superficialis

Shafts of middle phalanges of digits 2-5

32

Innervation of flexor digitorum superficialis

Median nerve C7,C8,T1

33

Action of flexor digitorum superficialis

Flexes proximal interphalangeal joints of digits 2-5
Acting more strongly, flexes proximal phalanges at metacarpophalangeal joint

34

Origin of flexor digitorum profundus

Proximal 3/4 of anterior and medial surfaces of ulna
Interosseus membrane

35

Insertion of flexor digitorum profundus

Bases of distal phalanges of digits 2-5

36

Innervation of flexor digitorum profundus

Digits 2&3: median nerve C8,T1
Digits 4&5: ulnar nerve C8,T1

37

Action of flexor digitorum profundus

Flexes distal interphalangeal joints of digits 2-5
Assist with wrist flexion

38

Origin of flexor pollicis longus

Anterior surface of radius
And adjacent interosseus membrane

39

Insertion of flexor pollicis longus

Base of distal phalanx of thumb

40

Innervation of flexor pollicis longus

Anterior interosseus nerve from median nerve C8,T1

41

Action of flexor pollicis longus

Flexes thumb

42

Origin of pronator quadratus

Distal quarter of anterior surface of ulna

43

Insertion of pronator quadratus

Distal quarter of anterior surface of radius

44

Innervation of pronator quadratus

Anterior interosseus from median nerve C8,T1

45

Action of pronator quadratus

Pronates forearm
Binds ulna and radius together

46

Insertion of brachioradialis

Lateral surface of distal end of radius
Proximal to styled process

47

Innervation of brachioradialis

Radial nerve C5,C6,C7

48

Action of brachioradialis

Relatively weak flexion of forearm
Maximal when forearm is in midpronated position

49

Origin of extensor Carpi Radialis longus

Lateral supra-epicondylar ridge

50

Insertion of extensor Carpi Radialis longus

Dorsal aspect of base of 2nd metacarpal

51

Innervation of extensor Carpi Radialis longus

Radial nerve C6,C7

52

Action of extensor Carpi Radialis longus

Extends wrist
Radial deviation

53

Origin of extensor Carpi radial brevis

Lateral epicondyle

54

Insertion of extensor Carpi Radialis brevis

Dorsal aspect of base of 3rd metacarpal

55

Innervation of extensor Carpi Radialis brevis

Deep branch of radial nerve C7,C8

56

Action of extensor Carpi Radialis brevis

Extends hand
Radial deviation
Active during fist clenching

57

Origin of extensor digitorum

Lateral epicondyle

58

Insertion of extensor digitorum

Extensor expansion of medial 4 fingers

59

Innervation of extensor digitorum

Posterior interosseus nerve C7,C8
Continuation of deep branch of radial nerve

60

Action of extensor digitorum

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

61

Origin of extensor digit minimi

Lateral epicondyle

62

Insertion of extensor digiti minimi

Extensor expansion of 5th finger

63

Innervation of extensor digiti minimi

Posterior interosseus nerve C7,C8
Continuation of. Deep branch of radial nerve

64

Action of extensor digit minimi

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

65

Origin of extensor Carpi ulnaris

Lateral epicondyle
Posterior border of ulna via a shared aponeurosis

66

Insertion of extensor Carpi ulnaris

Dorsal aspect of base of 5th metacarpal

67

Innervation of extensor Carpi ulnaris

Posterior interosseus nerve C7,C8
Continuation of deep branch of radial nerve

68

Action of extensor Carpi ulnaris

Extends hand
Ulnar deviation
Active during fist clenching

69

Origin of supinator

Lateral epicondyle
Radial collateral ligament
Annular ligament
Supinator fossa
Crest of ulna

70

Insertion of supinator

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

71

Innervation of supinator

Deep branch of radial nerve C7,C8

72

Action of supinator

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

73

Origin of abductor pollicis longus

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

74

Insertion of abductor pollicis longus

Base of 1st metacarpal

75

Innervation of abductor pollicis longus

Posterior interosseus nerve C7,C8
Continuation of deep branch of radial nerve

76

Action of abductor pollicis longus

Abducts thumb
Extends thumb at carpometacarpal joint

77

Origin of extensor pollicis longus

Posterior surface of middle third of ulna and interosseus membrane

78

Insertion of extensor pollicis longus

Dorsal aspect of base of distal phalanx of thumb

79

Innervation of extensor pollicis longus

Posterior interosseus nerve C7,C8
Continuation of deep branch of radial nerve

80

Action of extensor pollicis longus

Extends distal phalanx of thumb at interphalangeal joint
Extends metacarpophalangeal and carpometacarpal joints

81

Origin of extensor pollicis brevis

Posterior surface of distal third of radius and interosseus membrane

82

Insertion of extensor pollicis brevis

Dorsal aspect of base of proximal phalanx of thumb

83

Innervation of extensor pollicis brevis

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

84

Action of extensor pollicis brevis

Extends proximal phalanx of thumb at metacarpophalangeal joint
Extends carpometacarpal joint

85

Origin of extensor indicis

Posterior surface of distal third of ulna and interosseous membrane

86

Insertion of extensor indicis

Extensor expansion if 2nd finger

87

Innervation of extensor indicis

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

88

Action of extensor indicis

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

91

Name the thenar muscles

Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis
Adductor pollicis

134

Origin of brachioradialis

Proximal two thirds of lateral supra-epicondylar ridge