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abs muscles > Posterior Forearm > Flashcards

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
Q

Function of extensor carpi ulnaris

A

extends and adducts hand

26
Q

Origin of abductor pollicis longus

A

posterior surfaces of radius and ulna, interosseous membrane

27
Q

Insertion of abductor pollicis longus

A

base 1st metacarpal

28
Q

Innervation of abductor pollicis longus

A

radial nerve C7/8

29
Q

Function of abductor pollicis longus

A

abducts, extends and laterally rotates the thumb, abducts the hand

30
Q

Origin of extensor pollicis brevis

A

posterior surface of radius and interosseous membrane

31
Q

Insertion of extensor pollicis brevis

A

base 1st proximal phalanx

32
Q

Innervation of extensor pollicis brevis

A

radial nerve C7/8

33
Q

Function of extensor pollicis brevis

A

extends MCP, CMC of thumb and abducts hand

34
Q

Origin of extensor pollicis longus

A

posterior surface of ulna and interosseous membrane

35
Q

Insertion of extensor pollicis longus

A

base 1st distal phalanx

36
Q

Innervation of extensor pollicis longus

A

radial nerve C7/8

37
Q

Function of extensor pollicis longus

A

extends MCP, IP of thumb and abducts thumb

38
Q

Origin of extensor indicis

A

posterior surface of ulna and interosseous membrane

39
Q

Insertion of extensor indicis

A

extensor expansion of 2nd digit

40
Q

Innervation of extensor indicis

A

radial nerve C7/8

41
Q

Function of extensor indicis

A

extends index finger

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