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Gross Anatomy > Exam 2 Dorsal Forearm And Hand > Flashcards

Exam 2 Dorsal Forearm And Hand Flashcards

0
Q

What is the insertion of the brachioradialis?

A

lateral surface of distal end of radius proximal to styloid process

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1
Q

What is the origin of the brachioradialis?

A

proximal two thirds of lateral supraepicondylar ridge of humerus

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2
Q

What is the innervation of the brachioradialis?

A

Radial nerve C5, C6, C7

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3
Q

What is the main action of the brachioradialis?

A

Relatively weak flexion of the elbow joint, maximal when forearm is in midpronated position

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4
Q

What is the origin of the extensor carpi radialis longus?

A

Lateral supra-epicondylar ridge of humerus

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5
Q

What is the insertion of the extensor carpi radialis longus?

A

Dorsal aspect of base of 2nd metacarpal

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6
Q

What is the innervation of the extensor carpi radialis longus?

A

Radial Nerve C6, C7

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7
Q

What is the main action of the extensor carpi radialis longus?

A

Extend and abduct wrist joint

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8
Q

What is the origin of the extensor carpi radialis brevis?

A

Lateral epicondyle of humerus

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9
Q

What is the insertion of the extensor carpi radialis brevi?

A

Dorsal aspect of base of 3rd metacarpal

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10
Q

What is the innervation of the extensor carpi radialis brevis?

A

Deep branch of radial nerve C7, C8

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11
Q

What is the action of the extensor carpi radialis brevis?

A

Active during fist clenching

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12
Q

What is the origin of extensor digitorum?

A

Lateral epicondyle of humerus

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13
Q

What is the insertion of the extensor digitorum?

A

Extensor expansions of medial four fingers

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14
Q

What is the innervation of the extensor digitorum?

A

Posterior interosseous nerve C7, C8, continuous of deep branch of radial nerve

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15
Q

What is the main action of extensor digitorum?

A

Extend wrist joint, extend medial four fingers primarily at metacarpophalangeal joints

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16
Q

What is the origin of the extensor digiti minimi?

A

Lateral epicondyle of humerus

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17
Q

What is the insertion of extensor digiti minimi?

A

Extensor expansion of 5th finger

18
Q

What is the innervation of extensor digiti minimi?

A

Posterior interosseous nerve C7, C8, continuous of deep branch of radial nerve

19
Q

What is the main action of extensor digiti minimi?

A

Extends wrist joint; extends 5th finger primarily at metacarpopphhalaangeal joint, secondarily at interphalangeal joint

20
Q

What is the origin of the extensor carpi ulnaris?

A

Lateral epicondyle of humerus, posterior border of ulna via a shared aponeurosis

21
Q

What is the insertion of the extensor carpi ulnaris?

A

Dorsal aspect of base of 5th metacarpal

22
Q

What is the innervation of extensor carpi ulnaris?

A

Posterior interosseous nerve C7, C8; continuous of deep branch of radial nerve

23
Q

What is the action of extensor carpi ulnaris?

A

Extends and adducts wrist joint (also active during fist clenching)

24
Q

What is the origin of the supinator?

A

Lateral epicondyle of humerus; radial collateral and anular ligamennts; supinator fossa; crest of ulna

25
Q

What is the insertion of the supinator?

A

Lateral, posterior, and anterior surfaces of proximal third of radius

26
Q

What is the innervation of the supinator?

A

Deep branch of radial nerve C7, C8

27
Q

What is the action of the supinator?

A

Supinates forearm, rotates radius to turn palm anteriorly or superiorly (if elbow is flexed)

28
Q

What is the origin of the abductor pollicis longus?

A

Posterior surface of proximal halves of ulna, radius, interosseous membrane

29
Q

What is the insertion of the abductor pollicis longus?

A

Base of 1st metacarpal

30
Q

What is the innervation of the abductor pollicis longus?

A

Posterior interosseous nerve C7, C8; continuation of deep branch of radial nerve

31
Q

What is the action of the abductor pollicis longus?

A

Extends wrist joint; abducts thumb and extends it at carpometacarpal joint

32
Q

What is the origin of the extensor pollicis longus?

A

Posterior surface of middle third of ulna and interosseous membrane

33
Q

What is the insertion of the extensor pollicis longus?

A

dorsal aspecct of base of distal phalanx of thumb

34
Q

What is the innervation of the extensor pollicis longus?

A

Posterior interosseous nerve C7, C8; continuation of deep branch of radial nerve

35
Q

What is the action of the extensor pollicis longus?

A

extends wrist joint; extends distal phalanx of thumb at interphalangeal joint; extends metacarpophalangeal and carpometacarpal joints

36
Q

What is the origin of the extensor pollicis brevis?

A

Posterior surface of distal third of radius and interosseous membrane

37
Q

What is the insertion of extensor pollicis brevis?

A

Dorsal aspecct of base of proximal phalanx of thumb

38
Q

What is the innervation of extensor pollicis brevis?

A

Posterior interosseous nerve C7, C8; continuation of deep branch of radial nerve

39
Q

What is the action of extensor pollicis brevis?

A

extends wrist joint; extends proximal phalanx of thumb at metacarpophalangeal joint; extends carpometacarpal joint

40
Q

What is the origin of extensor indicis?

A

Posterior surface of distal third of ulna and interosseous membrane

41
Q

What is the insertion of the extensor indicis?

A

Extensor expansion of 2nd finger

42
Q

What is the innervation of extensor indicis?

A

Posterior interosseous nerve C7, C8; continuation of deep branch of radial nerve

43
Q

What is the action of extensor indicis?

A

Extends wrist joint; extends 2nd finger; helps extend hand at wrist

Gross Anatomy (16 decks)

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