Posterior Forearm Flashcards

1
Q

10 muscles of posterior forearm

A
supinator 
extensor carpi radialis longus
extensor carpi radialis brevis 
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
abductor pollicis longus
extensor pollicis brevis 
extensor pollicis longus
extensor indicis
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2
Q

Origin of supinator

A

lateral epicondyle of humerus, radial collateral ligament, annular radial ligament, olecranon

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3
Q

Insertion of supinator

A

lateral/posterior/anterior surfaces of radius

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4
Q

Innervation of supinator

A

radial nerve C5/6

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5
Q

Function of supinator

A

supinates forearm

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6
Q

Origin of extensor carpi radialis longus

A

lateral supracondylar ridge

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7
Q

Insertion of extensor carpi radialis longus

A

base 2nd metacarpal

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8
Q

Innervation of extensor carpi radialis longus

A

radial nerve C6/7

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9
Q

Function of extensor carpi radialis longus

A

extends and abducts hand

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10
Q

Origin of extensor carpi radialis brevis

A

lateral epicondyle of humerus

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11
Q

Insertion of extensor carpi radialis brevis

A

base 3rd metacarpal

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12
Q

Innervation of extensor carpi radialis brevis

A

radial nerve C7/8

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13
Q

Function of extensor carpi radialis brevis

A

extends and abducts hand

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14
Q

Origin of extensor digitorum

A

lateral epicondyle of humerus

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15
Q

Insertion of extensor digitorum

A

extensor expansions of fingers 2-5

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16
Q

Innervation of extensor digitorum

A

radial nerve C7/8

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17
Q

Function of extensor digitorum

A

extends wrist, MCP 2-5, IP 2-5, abducts fingers 2-5

18
Q

Origin of extensor digiti minimi

A

lateral epicondyle of humerus

19
Q

Insertion of extensor digiti minimi

A

extensor expansion of 5th digit

20
Q

Innervation of extensor digit minimi

A

radial nerve C7/8

21
Q

Function of extensor digiti minimi

A

extends 5th finger and wrist

22
Q

Origin of extensor carpi ulnaris

A

lateral epicondyle of humerus and posterior surface of ulna

23
Q

Insertion of extensor carpi ulnaris

A

base 5th metacarpal

24
Q

Innervation of extensor carpi ulnaris

A

radial nerve C7/8

25
Function of extensor carpi ulnaris
extends and adducts hand
26
Origin of abductor pollicis longus
posterior surfaces of radius and ulna, interosseous membrane
27
Insertion of abductor pollicis longus
base 1st metacarpal
28
Innervation of abductor pollicis longus
radial nerve C7/8
29
Function of abductor pollicis longus
abducts, extends and laterally rotates the thumb, abducts the hand
30
Origin of extensor pollicis brevis
posterior surface of radius and interosseous membrane
31
Insertion of extensor pollicis brevis
base 1st proximal phalanx
32
Innervation of extensor pollicis brevis
radial nerve C7/8
33
Function of extensor pollicis brevis
extends MCP, CMC of thumb and abducts hand
34
Origin of extensor pollicis longus
posterior surface of ulna and interosseous membrane
35
Insertion of extensor pollicis longus
base 1st distal phalanx
36
Innervation of extensor pollicis longus
radial nerve C7/8
37
Function of extensor pollicis longus
extends MCP, IP of thumb and abducts thumb
38
Origin of extensor indicis
posterior surface of ulna and interosseous membrane
39
Insertion of extensor indicis
extensor expansion of 2nd digit
40
Innervation of extensor indicis
radial nerve C7/8
41
Function of extensor indicis
extends index finger