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S1 Anatomy > Forearm Muscles > Flashcards

Forearm Muscles Flashcards

1
Q

pronator teres

-origin

A

medial epicondyle of humerus

coronoid process of ulna

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2
Q

pronator teres

-insertion

A

middle of lateral surface of radius

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3
Q

pronator teres

-actions

A

forearm pronation

forearm flexion

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4
Q

pronator teres

-innervation

A

median nerve (C6, C7)

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5
Q

flexor carpi radialis

-origin

A

medial epicondyle of humerus

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6
Q

flexor carpi radialis

-insertion

A

base of 2nd metacarpal

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7
Q

flexor carpi radialis

-actions

A

flexes hand

abducts hand

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8
Q

flexor carpi radialis

-innervation

A

median nerve (C6, C7)

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9
Q

palmaris longus

-origin

A

medial epicondyle of humerus

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10
Q

palmaris longus

-insertion

A

distal 1/2 of flexor retinaculum and palmar aponeurosis

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11
Q

palmaris longus

-actions

A

flexes hand

tightens palmar aponeurosis

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12
Q

palmaris longus

-innervation

A

median nerve (C7, C8)

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13
Q

flexor carpi ulnaris

-origin

A

humeral head
-medial epicondyle of humerus
ulnar head
-olecranon and posterior border of ulna

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14
Q

flexor carpi ulnaris

-insertion

A

pisiform
hook of hamate
5th metacarpal

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15
Q

flexor carpi ulnaris

-actions

A

flexes hand
adducts hand
(flexion of hand requires both flexor carpi radialis and flexor carpi ulnaris

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16
Q

flexor carpi ulnaris

-innervation

A

ulnar nerve (C7, C8)

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17
Q

flexor digitorum superficialis

-origin

A 
humeroulnar head
-medial epicondyle
-ulnar collateral ligament
-coronoid process
radial head
-superior 1/2 of anterior border of radius
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18
Q

flexor digitorum superficialis

-insertion

A

bodies of middle phalanges of medial four digits

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19
Q

flexor digitorum superficialis

-actions

A

flexes middle phalanges of medial 4 digits

stronger action flexes proximal phalanges and hand

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20
Q

flexor digitorum superficialis

-innervation

A

median nerve (C7-T1)

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21
Q

muscles of the superficial and intermediate layers of anterior surface of the forearm

A 
pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
flexor digitorum superficialis
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22
Q

muscles of the deep layer of the anterior surface of the forearm

A

flexor digitorum profundus
flexor pollicis longus
pronator quadratus

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23
Q

flexor digitorum profundus

-origin

A

proximal 3/4 of medial and anterior surfaces of ulna

interosseus membrane

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24
Q

flexor digitorum profundus

-insertion

A

bases of distal phalanges of medial 4 digits

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25
Q

flexor digitorum profundus

-action

A

flexes distal phalanges of medial 4 digits

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26
Q

flexor digitorum profundus

-innervation

A

medial part
-ulnar nerve (C8, T1)
lateral part
-median nerve (C8, T1)

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27
Q

flexor pollicis longus

-origin

A

anterior surface of radius

adjacent interosseus membrane

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28
Q

flexor pollicis longus

-insertion

A

base of distal phalanx of thumb

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29
Q

flexor pollicis longus

-action

A

flexes phalanges of 1st digit

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30
Q

flexor pollicis longus

-innervation

A

anterior interosseus nerve (from median nerve; C8, T1)

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31
Q

pronator quadratus

-origin

A

distal 1/4 of anterior surface of ulna

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32
Q

pronator quadratus

-insertion

A

distal 1/4 of anterior surface or radius

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33
Q

pronator quadratus

-actions

A

pronates forearm

deep fibers bind radius and ulna together assisting interosseus membrane

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34
Q

pronator quadratus

-innervation

A

anterior interosseus nerve (C8, T1)

35
Q

muscles of the superficial layer of the posterior surface of the forearm

A 
brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
anconeus
36
Q

brachioradialis

-origin

A

proximal 2/3 of lateral supraepicondylar ridge

37
Q

brachioradialis

-insertion

A

lateral surface of distal end of radius proximal to styloid process

38
Q

brachioradialis

-action

A

flexes forearm

39
Q

brachioradialis

-innervation

A

radial nerve (C5-C7)

40
Q

extensor carpi radialis longus

-origin

A

lateral supracondylar ridge

41
Q

extensor carpi radialis longus

-insertion

A

base of base of 2nd metacarpal

42
Q

extensor carpi radialis longus

-actions

A

extends hand at wrist joint

abducts hand at wrist joint

43
Q

extensor carpi radialis longus

-innervation

A

radial nerve (C6, C7)

44
Q

extensor carpi radialis brevis

-origin

A

lateral epicondyle of humerus

45
Q

extensor carpi radialis brevis

-insertion

A

base of 3rd metacarpal

46
Q

extensor carpi radialis brevis

-actions

A

extend hand

abduct hand

47
Q

extensor carpi radialis brevis

-innervation

A

deep branch of radial nerve (C7, C8)

48
Q

extensor digitorum

-origin

A

lateral epicondyle of humerus

49
Q

extensor digitorum

-insertion

A

extensor expansion of medial four digits

50
Q

extensor digitorum

-actions

A

extends medial four digits at MCP, PIP, DIP

extends hand at wrist

51
Q

extensor digitorum

-innervation

A

posterior interosseus nerve (branch of radial nerve; C7, C8)

52
Q

extensor digiti minimi

-origin

A

lateral epicondyle of humerus

53
Q

extensor digiti minimi

-insertion

A

extensor expansion of 5th digit

54
Q

extensor digiti minimi

-actions

A

extends digit 5 at MCP, PIP, DIP

55
Q

extensor digiti minimi

-innervation

A

posterior interosseus nerve (C7, C8)

56
Q

extensor carpi ulnaris

-origin

A

lateral epicondyle

posterior border of ulna

57
Q

extensor carpi ulnaris

-insertion

A

base of 5th metacarpal

58
Q

extensor carpi ulnaris

-actions

A

extends wrist

ulnar deviation of hand at wrist

59
Q

extensor carpi ulnaris

-innervation

A

posterior interosseus nerve (C7, C8)

60
Q

anconeus

-origin

A

lateral epicondyle of humerus

61
Q

anconeus

-insertion

A

lateral surface of olecranon

superior part of posterior surface of ulna

62
Q

anconeus

-actions

A

assists triceps in extending elbow joint
stabilizes elbow joint
abducts ulna during pronation

63
Q

anconeus

-innervation

A

radial nerve (C7-T1)

64
Q

supinator

-origin

A 
lateral epicondyle of humerus
radial collateral ligament
annular ligament
supinator fossa
crest of ulna
65
Q

supinator

-insertion

A

lateral, posterior, and anterior surfaces of proximal 1/3 of radius

66
Q

supinator

-actions

A

supinates forearm

67
Q

supinator

-innervation

A

deep branch of radial nerve (C7, C8)

68
Q

abductor pollicis longus

-origin

A

posterior surfaces of ulna and radius

interosseus membrane

69
Q

abductor pollicis longus

-insertion

A

base of proximal phalanx of thumb via extensor expansion

70
Q

abductor pollicis longus

-action

A

abducts and extends thumb at CMC

71
Q

abductor pollicis longus

-innervation

A

posterior interosseus nerve (C7, C8)

72
Q

extensor pollicis brevis

-origin

A

posterior surface of radius

interosseus membrane

73
Q

extensor pollicis brevis

-insertion

A

base of proximal phalanx of thumb via extensor expansion

74
Q

extensor pollicis brevis

-actions

A

extends thumb at proximal phalanx of MCP

75
Q

extensor pollicis brevis

-innervation

A

posterior interosseus nerve (C7, C8)

76
Q

extensor pollicis longus

-origin

A

posterior surface and middle of ulna

interosseus membrane

77
Q

extensor pollicis longus

-insertion

A

base of distal phalanx of thumb via extensor expansion

78
Q

extensor pollicis longus

-actions

A

extends distal phalanx of thumb at IP joint

MCP joint

79
Q

extensor pollicis longus

-innervation

A

posterior interosseus nerve (C7, C8)

80
Q

extensor indicis

-origin

A

posterior surface of ulna

interosseus memebrane

81
Q

extensor indicis

-insertion

A

extensor expansion of 2nd digit

82
Q

extensor indicis

-action

A

extends index fing independently

assists in wrist extension

83
Q

extensor indicis

-innervation

A

posterior interosseus nerve (C7, C8)

S1 Anatomy (31 decks)

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