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Gross Anatomy > Muscles Forearm > Flashcards

Muscles Forearm Flashcards

1
Q

Superficial muscles of the volar forearm

A

Pronator teres, Flexor carpi radialis, Palmaris longus, Flexor carpi ulnaris

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2
Q

Origin of pronator teres

A

Humeral head - medial epicondyle of humerus

Ulnar head - coronoid process

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3
Q

Insertion of pronator teres

A

Lateral radius

distal to supinator insertion

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4
Q

Innervation of pronator teres

A

Median nerve (C6-C7)

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5
Q

Action of pronator teres

A

Elbow - weak flexor

Forearm - pronation

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6
Q

Origin of flexor carpi radialis

A

Medial epicondyle of humerus

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7
Q

Insertion of flexor carpi radialis

A

Base of 2nd metacarpal

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8
Q

Innervation of flexor carpi radialis

A

Median Nerve (C6-C7)

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9
Q

Action of flexor carpi radialis

A

Wrist - flexion, radial deviation of hand

*radial deviation = abduction

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10
Q

Origin of palmaris longus

A

Medial epicondyle of humerus

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11
Q

Insertion of palmaris longus

A

Palmar aponeurosis

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12
Q

Innervation of palmaris longus

A

Median nerve (C7-C8)

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13
Q

Action of palmaris longus

A

Elbow - weak flexor

Wrist - flexion tightens aponeurosis

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14
Q

Origin of flexor carpi ulnaris

A

Humeral head - medial epicondyle of humerus

Ulnar head - olecranon

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15
Q

Insertion of flexor carpi ulnaris

A

Pisiform, Hook of hammate, base of 5th metacarpal

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16
Q

Innervation of flexor carpi ulnaris

A

Ulnar nerve (C7-T1)

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17
Q

Action of flexor carpi ulnaris

A

Wrist - flexion; ulnar deviation

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18
Q

Intermediate muscles of the volar forearm

A

Flexor digitorum superficialis

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19
Q

Origin of flexor digitorum superficialis

A

Humeroulnar head - medial epicondyle of humerus

Radial head - Upper half of anterior surface of radius

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20
Q

Insertion of flexor digitorum superficialis

A

Sides of middle phalanges of the 2nd to 5th digits

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21
Q

Innervation of flexor digitorum superficialis

A

Median nerve (C8-T1)

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22
Q

Action of flexor digitorum superficialis

A

Elbow - weak flexor

Wrist, MCP, PIP of 2nd to 5th digits - flexion

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23
Q

Deep muscles of volar forearm

A

Flexor digitorum profundus, Flexor Pollicis Longus, Pronator Quadratus

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24
Q

Origin of flexor digitorum profundus

A
  • Proximal 2/3 of anterior surface of ulna

- Interosseus membrane

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25
Q

Insertion of flexor digitorum profundus

A

Distal phalange of 2nd to 5th digits (palmar surface)

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26
Q

Innervation of flexor digitorum profundus

A 
Anterior interosseus branch of Median nerve (C8-T1)
Ulnar Nerve (C8-T1)
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27
Q

Action of flexor digitorum profundus

A

Wrist, MCP, PIP, DIP of 2nd - 5th digits : flexion

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28
Q

Origin of Flexor pollicis longus

A
  • Midanterior surface of radius

- Interosseus membrane

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29
Q

Insertion of flexor pollicis longus

A

Distal phalanx of thumb (palmar surface)

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30
Q

Innervation of flexor pollicis longus

A

Anterior interosseus branch of Median nerve (C8-T1)

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31
Q

Action of flexor pollicis longus

A

Wrist - flexion, radial deviation of the hand
Carpometacarpal of thumb - flexion
MCP, IP of thumb - flexion

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32
Q

Origin of pronator quadratus

A

Distal quarter of ulna (anterior surface)

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33
Q

Insertion of pronator quadratus

A

Distal quarter of radius (anterior surface)

34
Q

Innervation of pronator quadratus

A

Anterior interosseus branch of Median nerve (C8-T1)

35
Q

Action of pronator quadratus

A

Hand - pronation

Distal radioulnar joint - stabilization

36
Q

Layers of the muscles of the volar forearm

A

Superficial, intermediate, deep

37
Q

Origin of Brachioradialis

A
  • Distal surface of humerus

- Lateral intermuscular septum

38
Q

Insertion of brachioradialis

A

Styloid process of radius

39
Q

Innervation of brachioradialis

A

Radial nerve (C5-C6)

40
Q

Action of brachioradialis

A
  • Weak elbow flexor (in semipronation)

- Semipronation of elbow

41
Q

Origin of extensor carpi radialis longus

A
  • Lateral supracondylar ridge

- Lateral intermuscular septum

42
Q

Insertion of extensor carpi radialis longus

A

Base of 2nd metacarpal

43
Q

Innervation of extensor carpi radialis longus

A

Radial nerve (C6-C7)

44
Q

Action of extensor carpi radialis longus

A

Elbow - weak flexor

Wrist - radial deviation; extension

45
Q

Origin of extensor carpi radialis brevis

A

Lateral epicondyle of humerus

46
Q

Insertion of extensor carpi radialis brevis

A

Base of 3rd metacarpal

47
Q

Innervation of extensor carpi radialis brevis

A

Radial nerve (C7-C8)

48
Q

Action of extensor carpi radialis brevis

A

Elbow - weak flexor

Wrist - extension; radial deviation

49
Q

Origin of extensor digiti minimi

A

Lateral epicondyle of humerus

50
Q

Origin of extensor digitorum

A

Lateral epicondyle of humerus

51
Q

Insertion of extensor digitorum

A

Dorsal digital expansion of digits 2-5

52
Q

Innervation of extensor digitorum

A

Posterior interosseus branch of Radial nerve (C7-C8)

53
Q

Action of extensor digitorum

A

Wrist - extension

MCP, PIP, DIP of 2nd to 5th digits - extension and abduction of fingers

54
Q

Origin of extensor digiti minimi

A

Lateral epicondyle of humerus

55
Q

Insertion of extensor digiti minimi

A

Dorsal digital expansion of 5th digit

56
Q

Innervation of extensor digiti minimi

A

Posterior interosseus branch of Radial Nerve (C7-C8)

57
Q

Action of extensor digiti minimi

A

Wrist - extension, ulnar deviation

MCP, PIP, DIP of 5th digit - extension and abduction of 5th digit

58
Q

Origin of Extensor carpi ulnaris

A
  • Lateral epicondyle of humerus

- Dorsal surface of ulnar head

59
Q

Insertion of extensor carpi ulnaris

A

Base of 5th metacarpal

60
Q

Innervation of extensor carpi ulnaris

A

Posterior interosseus branch of Radial nerve (C7-C8)

61
Q

Action of extensor carpi ulnaris

A

Wrist - extension, ulnar deviation

62
Q

Origin of supinator

A

Olecranon process of ulna, lateral epicondyle of humerus, annular ligament, radial collateral ligament

63
Q

Insertion of supinator

A

Radius

in between the radial tuberosity and the insertion of the pronator teres

64
Q

Innervation of supinator

A

Posterior interosseus branch of Radial nerve (C6-C7)

65
Q

Action of supinator

A

Forearm - supination

66
Q

Origin of abductor pollicis longus

A
  • Posterior surface of radius and ulna

- Interosseus membrane

67
Q

Insertion of abductor pollicis longus

A

Base of 1st metacarpal

68
Q

Innervation of abductor pollicis longus

A

Posterior interosseus branch of Radial nerve (C7-C8)

69
Q

Action of abductor pollicis longus

A

Wrist - radial deviation

CMC of thumb - abduction of thumb

70
Q

Origin of extensor pollicis brevis

A
  • Posterior surface of radius

- Interosseus membrane

71
Q

Insertion of extensor pollicis brevis

A

Base of proximal phalanx of thumb

72
Q

Innervation of extensor pollicis brevis

A

Posterior interosseus branch of Radial nerve (C7-C8)

73
Q

Action of extensor pollicis brevis

A

Wrist - radial deviation

CMC, MCP of thumb - extension of thumb

74
Q

Origin of extensor pollicis longus

A
  • Posterior surface of ulna

- Interosseus membrane

75
Q

Insertion of extensor pollicis longus

A

Base of distal phalanx of thumb

76
Q

Innervation of extensor pollicis longus

A

Posterior interosseus branch of Radial nerve (C7-C8)

77
Q

Action of extensor pollicis longus

A

Wrist - extension and radial deviation
CMC of thumb - adduction
MCP, IP of thumb - extension

78
Q

Origin of extensor indicis

A
  • Posterior surface of ulna

- Interosseus membrane

79
Q

Insertion of extensor indicis

A

Dorsal digital expansion of 2nd digit

80
Q

Innervation of extensor indicis

A

Posterior interosseus branch of Radial nerve (C7-C8)

81
Q

Action of extensor indicis

A

Wrist - Extension

MCP, PIP, DIP of 2nd digit - extension

Gross Anatomy (11 decks)

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