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620: Clinical Human Anatomy > Posterior Forearm Muscles > Flashcards

Posterior Forearm Muscles Flashcards

1
Q

Origin of the brachioradialis

A

Proximal 2/3 of lateral supracondylar ridge of humerus

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2
Q

Insertion of the brachioradialis

A

Lateral surface of distal end of radius, proximal to styloid process

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3
Q

What does the brachioradialis do?

A

Flexes the forearm at the elbow joint

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4
Q

What innervates the brachioradialis?

A

Radial nerve

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5
Q

Origin of the extensor carpi radialis longus

A

Lateral supracondylar ridge of humerus

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6
Q

Insertion of the extensor carpi radialis longus

A

Base of 2nd metacarpal

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7
Q

What does the extensor carpi radialis longus do?

A

Extend and abduct hand at wrist joint

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8
Q

What innervates the extensor carpi radialis longus?

A

Radial nerve

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9
Q

Origin of the Extensor Carpi Radialis Brevis

A

Lateral epicondyle of humerus

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10
Q

Insertion of the Extensor Carpi Radialis Brevis

A

Base of 3rd metacarpal

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11
Q

What does the Extensor Carpi Radialis Brevis do?

A

Extend and abduct (radial deviation) hand at wrist joint

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12
Q

What innervates the Extensor Carpi Radialis Brevis?

A

Radial nerve

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13
Q

Origin of the Extensor Digitorum

A

Lateral epicondyle of humerus

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14
Q

Insertion of the Extensor Digitorum

A

Extensor expansions of medial four digits

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15
Q

What does the extensor digitorum do?

A

Extends medial four digits at metacarpophalangeal joints

Extends hand at wrist joint

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16
Q

What innervates the extensor digitorum?

A

Radial nerve

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17
Q

Origin of the extensor digitorum minimi

A

Lateral epicondyle of humerus

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18
Q

Insertion of the extensor digitorum minimi

A

Extensor expansion of 5th digit

19
Q

What does the extensor digitorum minimi do?

A

Extends 5th digit at metacarpophalangeal and interphalangeal joints

20
Q

What innervates the extensor digitroum minimi?

A

Radial nerve

21
Q

Origin of the extensor carpi ulnaris

A

Lateral epicondyle of humerus

Posterior border of ulna

22
Q

Insertion of the extensor carpi ulnaris

A

Base of 5th metacarpal

23
Q

What does the extensor carpi ulnaris do?

A

Extends and adducts (ulnar deviation) hand at wrist joint

24
Q

What innervates the extensor carpi ulnaris?

A

Radial nerve

25
Q

Origin of the supinator

A

Lateral epicondyle of humerus
Radial collateral and annular ligaments
Supinator fossa
Crest of ulna

26
Q

Insertion of the supinator

A

Lateral, posterior and anterior surfaces of proximal third of radius

27
Q

What does the supinator do?

A

Supinates forearm (i.e. rotates radius to turn palm anteriorly)

28
Q

What innervates the supinator?

A

Radial nerve

29
Q

Origin of the extensor indicis

A

Posterior surface of ulna and interosseous membrane

30
Q

Insertion of the extensor indicis

A

Extensor expansion of 2nd digit

31
Q

What does the Extensor Indicis do?

A

Extends 2nd digit and helps to extend hand

32
Q

What innervates the extensor indicis?

A

Radial nerve

33
Q

Origin of the abductor pollicis longus

A

Posterior surface of proximal ½ of ulna, radius and interosseous membrane

34
Q

Insertion of the abductor pollicis longus

A

Base of 1st metacarpal

35
Q

What does the abductor pollicis longus do?

A

Abducts thumb and extends it at carpometacarpal joint

36
Q

What innervates the abductor pollicis longus?

A

Radial nerve

37
Q

Origin of the extensor pollicis longus

A

Posterior surface of middle third of ulna and interosseous membrane

38
Q

Insertion of the extensor pollicis longus

A

Base of distal phalanx of thumb

39
Q

What does the extensor pollicis longus do?

A

Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints

40
Q

What innervates the extensor pollicis longus?

A

Radial nerve

41
Q

Origin of the extensor pollicis brevis

A

Posterior surface of distal third of radius and interosseous membrane

42
Q

Insertion of the extensor pollicis brevis

A

Base of proximal phalanx of thumb

43
Q

What does the extensor pollicis brevis do?

A

Extends proximal phalanx of thumb at carpometacarpal joint

44
Q

What innervates the extensor pollicis brevis?

A

Radial nerve

620: Clinical Human Anatomy (29 decks)

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