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