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Anatomy Block 4 > Posterior compartment of the forearm > Flashcards

Posterior compartment of the forearm Flashcards

1
Q

origin of the brachioradialis

A

lateral supracondylar ridge of humerus

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2
Q

insertion of the brachioradialis

A

styloid process of radius

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3
Q

action of the brachioradialis

A

flexion at elbow

supination of the forearm

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4
Q

innervation of 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

tendon passes under extensor retinaculum and attaches to base of 2nd metacarpal

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7
Q

action of the extensor carpi radialis longus

A

extension and abduction of hand at wrist

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8
Q

innervation of the extensor carpi radialis longus

A

radial nerve

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9
Q

origin of extensor carpi radialis brevis

A

common extensor tendon

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10
Q

insertion of the extensor carpi radialis brevis

A

tendon passes under extensor retinaculum and inserts into base of 3rd metacarpal

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11
Q

action of the extensor carpi radialis brevis

A

extension and abduction of hand at wrist

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12
Q

innervation of the extensor carpi radialis brevis

A

deep branch of the radial nerve

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13
Q

origin of the extensor digitorum

A

common extensor tendon

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14
Q

insertion of the extensor digitorum

A

4 tendons fan out over dorsum of hand to form expansions near interphalangeal joints

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15
Q

action of the extensor digitorum

A

extension of medial 4 fingers and extension of hand at wrist joint

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16
Q

innervation of the extensor digitorum

A

deep branch of the radial nerve

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17
Q

origin of the extensor digiti minimi

A

common extensor tendon

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18
Q

insertion of the extensor digiti minimi

A

tendon passes under extensor retinaculum and inserts onto little finger

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19
Q

action of the extensor digiti minimi

A

extension of little finger and extension of hand at wrist joint

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20
Q

innervation of the extensor digiti minimi

A

deep branch of the radial nerve

21
Q

origin of the extensor carpi ulnaris

A

HUMERAL HEAD: common extensor tendon

ULNAR HEAD: shaft of the ulna

22
Q

insertion of the extensor carpi ulnaris

A

tendon passes under the extensor retinaculum and inserts into the base of the 5th metacarpal

23
Q

action of the extensor carpi ulnaris

A

extension and adduction of the hand at the wrist joint

24
Q

innervation of the extensor carpi ulnaris

A

deep branch of radial nerve

25
Q

origin of the anconeus

A

lateral epicondyle of the humerus

26
Q

insertion of the anconeus

A

olecranon + shaft of the ulna

27
Q

action of the anconeus

A

extension of the forearm at the elbow joint

28
Q

innervation of the anconeus

A

radial nerve

29
Q

origin of the supinator

A

lateral epicondyle of the humerus, radial collateral and annual ligaments of elbow joint, and ulna

30
Q

insertion of the supinator

A

upper 1/3 of radius

31
Q

action of the supinator

A

supination of forearm

32
Q

innervation of the suppinator

A

deep branch of radial nerve

33
Q

origin of the abductor pollicis longus

A

shafts of ulna and radius + interosseus membrane

34
Q

insertion of the abductor pollicis longus

A

tendon inserts into the base of the 1st metacarpal

35
Q

action of the abductor pollicis longus

A

abducts and extends thumb + abduction of hand at wrist joint

36
Q

innervation of the abductor pollicis longus

A

deep branch of radial nerve

37
Q

origin of extensor pollicis brevis

A

shaft of the radius + interosseous membrane

38
Q

insertion of the extensor pollicis brevis

A

base of the proximal phalanx of the thumb

39
Q

action of the extensor pollicis brevis

A

Extends proximal phalanx of thumb and 1st metacarpal

40
Q

innervation of the extensor pollcis brevis

A

deep branch of the radial nerve

41
Q

origin of the extensor pollicis longus

A

shaft of the ulna + interosseus membrane

42
Q

insertion of the extensor pollicis longus

A

base of the distal phalanx of the thumb

43
Q

action of the extensor pollicis longus

A

extension of the distal and proximal phalanges of the thumb and 1st metacarpal

44
Q

innervation of the extensor pollicis longus

A

deep branch of radial nerve

45
Q

origin of the extensor indicis

A

shaft of ulna + interosseus membrane

46
Q

insertion of extensor indicis

A

tendon inserts into the extensor expansion of the index finger

47
Q

action of extensor indicis

A

Extends phalanges of the index finger and extends hand at the wrist joint

48
Q

innervation of extensor indicis

A

deep branch of radial nerve

Anatomy Block 4 (14 decks)

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