Forearm Muscles Flashcards Preview

S1 Anatomy > Forearm Muscles > Flashcards

Flashcards in Forearm Muscles Deck (83):
1

pronator teres
-origin

medial epicondyle of humerus
coronoid process of ulna

2

pronator teres
-insertion

middle of lateral surface of radius

3

pronator teres
-actions

forearm pronation
forearm flexion

4

pronator teres
-innervation

median nerve (C6, C7)

5

flexor carpi radialis
-origin

medial epicondyle of humerus

6

flexor carpi radialis
-insertion

base of 2nd metacarpal

7

flexor carpi radialis
-actions

flexes hand
abducts hand

8

flexor carpi radialis
-innervation

median nerve (C6, C7)

9

palmaris longus
-origin

medial epicondyle of humerus

10

palmaris longus
-insertion

distal 1/2 of flexor retinaculum and palmar aponeurosis

11

palmaris longus
-actions

flexes hand
tightens palmar aponeurosis

12

palmaris longus
-innervation

median nerve (C7, C8)

13

flexor carpi ulnaris
-origin

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

14

flexor carpi ulnaris
-insertion

pisiform
hook of hamate
5th metacarpal

15

flexor carpi ulnaris
-actions

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

16

flexor carpi ulnaris
-innervation

ulnar nerve (C7, C8)

17

flexor digitorum superficialis
-origin

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

18

flexor digitorum superficialis
-insertion

bodies of middle phalanges of medial four digits

19

flexor digitorum superficialis
-actions

flexes middle phalanges of medial 4 digits
stronger action flexes proximal phalanges and hand

20

flexor digitorum superficialis
-innervation

median nerve (C7-T1)

21

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

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
flexor digitorum superficialis

22

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

flexor digitorum profundus
flexor pollicis longus
pronator quadratus

23

flexor digitorum profundus
-origin

proximal 3/4 of medial and anterior surfaces of ulna
interosseus membrane

24

flexor digitorum profundus
-insertion

bases of distal phalanges of medial 4 digits

25

flexor digitorum profundus
-action

flexes distal phalanges of medial 4 digits

26

flexor digitorum profundus
-innervation

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

27

flexor pollicis longus
-origin

anterior surface of radius
adjacent interosseus membrane

28

flexor pollicis longus
-insertion

base of distal phalanx of thumb

29

flexor pollicis longus
-action

flexes phalanges of 1st digit

30

flexor pollicis longus
-innervation

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

31

pronator quadratus
-origin

distal 1/4 of anterior surface of ulna

32

pronator quadratus
-insertion

distal 1/4 of anterior surface or radius

33

pronator quadratus
-actions

pronates forearm
deep fibers bind radius and ulna together assisting interosseus membrane

34

pronator quadratus
-innervation

anterior interosseus nerve (C8, T1)

35

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

brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
anconeus

36

brachioradialis
-origin

proximal 2/3 of lateral supraepicondylar ridge

37

brachioradialis
-insertion

lateral surface of distal end of radius proximal to styloid process

38

brachioradialis
-action

flexes forearm

39

brachioradialis
-innervation

radial nerve (C5-C7)

40

extensor carpi radialis longus
-origin

lateral supracondylar ridge

41

extensor carpi radialis longus
-insertion

base of base of 2nd metacarpal

42

extensor carpi radialis longus
-actions

extends hand at wrist joint
abducts hand at wrist joint

43

extensor carpi radialis longus
-innervation

radial nerve (C6, C7)

44

extensor carpi radialis brevis
-origin

lateral epicondyle of humerus

45

extensor carpi radialis brevis
-insertion

base of 3rd metacarpal

46

extensor carpi radialis brevis
-actions

extend hand
abduct hand

47

extensor carpi radialis brevis
-innervation

deep branch of radial nerve (C7, C8)

48

extensor digitorum
-origin

lateral epicondyle of humerus

49

extensor digitorum
-insertion

extensor expansion of medial four digits

50

extensor digitorum
-actions

extends medial four digits at MCP, PIP, DIP
extends hand at wrist

51

extensor digitorum
-innervation

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

52

extensor digiti minimi
-origin

lateral epicondyle of humerus

53

extensor digiti minimi
-insertion

extensor expansion of 5th digit

54

extensor digiti minimi
-actions

extends digit 5 at MCP, PIP, DIP

55

extensor digiti minimi
-innervation

posterior interosseus nerve (C7, C8)

56

extensor carpi ulnaris
-origin

lateral epicondyle
posterior border of ulna

57

extensor carpi ulnaris
-insertion

base of 5th metacarpal

58

extensor carpi ulnaris
-actions

extends wrist
ulnar deviation of hand at wrist

59

extensor carpi ulnaris
-innervation

posterior interosseus nerve (C7, C8)

60

anconeus
-origin

lateral epicondyle of humerus

61

anconeus
-insertion

lateral surface of olecranon
superior part of posterior surface of ulna

62

anconeus
-actions

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

63

anconeus
-innervation

radial nerve (C7-T1)

64

supinator
-origin

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

65

supinator
-insertion

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

66

supinator
-actions

supinates forearm

67

supinator
-innervation

deep branch of radial nerve (C7, C8)

68

abductor pollicis longus
-origin

posterior surfaces of ulna and radius
interosseus membrane

69

abductor pollicis longus
-insertion

base of proximal phalanx of thumb via extensor expansion

70

abductor pollicis longus
-action

abducts and extends thumb at CMC

71

abductor pollicis longus
-innervation

posterior interosseus nerve (C7, C8)

72

extensor pollicis brevis
-origin

posterior surface of radius
interosseus membrane

73

extensor pollicis brevis
-insertion

base of proximal phalanx of thumb via extensor expansion

74

extensor pollicis brevis
-actions

extends thumb at proximal phalanx of MCP

75

extensor pollicis brevis
-innervation

posterior interosseus nerve (C7, C8)

76

extensor pollicis longus
-origin

posterior surface and middle of ulna
interosseus membrane

77

extensor pollicis longus
-insertion

base of distal phalanx of thumb via extensor expansion

78

extensor pollicis longus
-actions

extends distal phalanx of thumb at IP joint
MCP joint

79

extensor pollicis longus
-innervation

posterior interosseus nerve (C7, C8)

80

extensor indicis
-origin

posterior surface of ulna
interosseus memebrane

81

extensor indicis
-insertion

extensor expansion of 2nd digit

82

extensor indicis
-action

extends index fing independently
assists in wrist extension

83

extensor indicis
-innervation

posterior interosseus nerve (C7, C8)