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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
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)

S1 Anatomy (31 decks)

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