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Anatomy 315 > lecture 14: posterior forearm and hand > Flashcards

lecture 14: posterior forearm and hand Flashcards

1
Q

what is the proximal attachment of the brachioradialis

A

latearl supracondylar ridge of humeral

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2
Q

what is the insetion of the brachioradialis

A

styloid process of the radius

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3
Q

what is the action of the brachioradialis

A

flexion of the forearm at the elbow

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4
Q

what is the inneravation of the brachioradialis

A

radial n

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5
Q

what is the origin of the anconeus

A

lateral epicondyle of humerus

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6
Q

what is the insertion of the anconeus

A

olecrannon process

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7
Q

what is the function of the anconeus m

A

extension of the ekbow

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8
Q

what is the innervation of the anconeus

A

radial n

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9
Q

what is the origin of the supinator

A

lateral epicondyle of humerus, proximal ulna

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10
Q

what is the insertion os the supinator

A

proximal radius (lateral)

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11
Q

what is the function of the supinator

A

supination of the forearm

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12
Q

what is the inneravtion of the supinator

A

radial n

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13
Q

be able to locate brochioradialis, anconoeus, supinator

A

.

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14
Q

what are the muscles in the superficial layer of the posterior compartment of the forearm

A

extensor carpis radlialis longus
extensor carpi radialis brevis
extensor digitorem
extensor carpi ulnaris
extensor digiti minimi

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15
Q

what are the deep muscles of the posterior compartment of the forearm

A

extensor pollicus longus
extensor pollicis brevis
extensor indicis
abductor pollicis longus

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16
Q

true or false: the brachioradialis does not cross carpus

A

true

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17
Q

what is the orogin of the extensor carpi radialis longus

A

lateral supracondylar ridge of humerus

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18
Q

what is the insertion of the extensor carpi radialis longus

A

base of metacarpal II

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19
Q

what is the orogin of the extensor carpi radialis brevis

A

lateral epicondyle of humerus

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20
Q

what is the insertion of the extensor carpi radialis brevis

A

base of metacarpal III

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21
Q

what are thee functions of extensor carpis radialis longus and brevis

A

extension at the wrist and radial deviation (abduction)

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22
Q

what is the origin of the extensor digitorem

A

lateral epicondyle (common origin)

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23
Q

what is the insertion of the extensor digitorem

A

splits into 4 tendons, digits II to V (2-5) via the extensor expansion hood

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24
Q

true or false, the extensor carpi radialis brevis inserts via the extensor expansion hood

A

false, the extensor digitorem dos

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25
Q

what are the functions of the extensor digitorem

A

extension at the wrist, MCP, PIP and DIP

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26
Q

the extensor digitorem extends just the wrist and MCP

A

false, also the PIP and DIP

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27
Q

what four muscles of the posterior compartment share the common origin of the lateral humeral epicondyle

A

extensor carpi ulnaris
extensor digiti minimi
extensor digitorem
extensor carpi ulnaris

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28
Q

what is the origin of the extensor carpi ulnaris

A

lateral humeral epicondyle (common origin)

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29
Q

what is the insertion of the extensor carpi ulnaris

A

base of metacarpa V (base of the 5th metacarpal)

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30
Q

what is the function of the extensor carpi ulnaris

A

extension and adduction (ulnar deviation) of the hand at the wrist

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31
Q

what is the origin of the extensor digiti minimi

A

lateral humeral epicondyle (common origin)

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32
Q

what is the insertion of the extensor digiti minimi

A

extensor expansion hood of digit V (5th digit)

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33
Q

what is the function of extensor digiti minimi

A

accessory/independant extension of digit V

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34
Q

be able to locate extensor carpi ulnaris and digiti mnini.

A
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35
Q

what are the proximal attachements of the deep layer of the posterior compartment of the arm

A

posterolateral ulna and interosseus membrane

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36
Q

what is the origin of the extensor pollicis longus

A

posterolateral ulna and interosseus membrane

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37
Q

what is the insertion of the extensor pollicis longus

A

distal phalanx digit I (thumb)

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38
Q

what is the origin of the extensor pollicus brevis

A

posterolateral ulna and interosseus membrane

39
Q

what is the insertion of the extensor pollicus brevis

A

proximal phalanx of digit 1 (thumb)

40
Q

which muscle inserts on the proximal phalanx of digit 1 (thumb)

A

extensor pollicus brevis

41
Q

what is the origin of the extensor indivis

A

posterolateral ulna and interosseus membrane

42
Q

what is the isnertion of the extensor indicis

A

distal phalanx of digit II (index)

43
Q

what is the function of the extensor indicis

A

accessory/independant extension of index finger (digit II)

44
Q

what is the origin of the abductor pollicus longus

A

posterolateral ulna and interosseus membrane

45
Q

what is the insertion of the abductor pollicus longus

A

base of metacarpal I (thumb)

46
Q

what is the function of the abductor pollicus longus

A

thumb abduction

47
Q

what is the function of the dorsal tubercle of the radius

A

serves as a pulley for extensor pollicus longus

48
Q

explain the brevis sandwihich of the hand

A

brevis tendon between 2 longus tendons

medial 2= thumb extensors
lateral 1= thumb abductor

49
Q

what does the median n (C6-T1) innervate on the anterior compartment of the forearm

A

to the anterior compartment of the forearm mm EXCEPT FCU and medial 1/2 FDP

50
Q

what does the anterior interosseus n supply on the anterior forearm

A

the deeper muscles : FDP(lateral 1/2), FPL, pronator quadratus

51
Q

what does the ulnar n supply on the anterior compartment

A

FCU and medial half of FDP

52
Q

what is the sensory inneration of the anterior compartment of the forearm

A

lateral antebrachial cutaneous n (from musulo)
superfial radial
median
ulnar
medial anterbrachial cutaneus (from medial cord)

53
Q

know the graphic of the cuteanous supply of the anterior forearm

A

/.

54
Q

motor innervation of posterior compartment of forearm comes from what nerve

A

radial (c5-t1)

55
Q

deep branch of the radial n pierces through what muscle

A

supinator

56
Q

radial n itself supplies what muscles on the psoterior forearm

A

anconeus
brachioradialis
ECRL/B

57
Q

what does radial n branch into on the posterior forearm

A

deep branch (as psoterior interosseus)
superficial radial n

58
Q

superficial radial n is deep to what muscle

A

brachioradialis

59
Q

true or false: superficial radial n provides both sensory and motor inneravtion

A

false, only sensory

60
Q

true or false: the deep branch of radial (as posterior interosseus) innervates ALL the muscles of the psoterior compartment of forearm

A

false, all of the other posterior msucles taht are not anconeus, brachioradialis and ECRL/B

61
Q

what is the main sensory inneravtion of the psoterior compartment of the forearm

A

medial and lateral antebrachial cutaneus n

62
Q

the anastomoses around the elbow are between what types of arteries

A

recurrent and collateral arteries

63
Q

radial collateral a anastomoses with what artery at the elbow

A

radial reccurent a

64
Q

the middle collateral a anastomoses with what artery at the elbow

A

recurrent interosseus

65
Q

the inferior ulnar collateral a anastomoses with what a at the elbow

A

anterior ulnar reccurent

66
Q

the superior ulnar collarteral a anastomses with what a at the elbow

A

posterior ulnar reccurent a

67
Q

what does the brachial artery split into after the cubital fossa

A

radial and ulnar a

68
Q

the deep brachial artery goes posteriorly with what other vessel

A

radial n

69
Q

what are the terminal brancges of the deep brachial a

A

middle collateral and radial collateral

70
Q

the terminal branches of the deep brachial a do not go past what structurew

A

elbow

71
Q

where does the common interosseus branch off of

A

ulnar a

72
Q

where does the posterior interosseus a come from

A

common branch

73
Q

what are the 2 branches off the common interosseus (from ulnar)

A

posterior and anterior interosseus ARTERIES

74
Q

what does the posterior interosseus a supply

A

muscles of the deep posterior comparttment

75
Q

what does the anterior interosseus a supply

A

supplies deep muscles of the anterior compartment

76
Q

true or false: the posterior interosseus a supplies the deep posterior compartment

A

true

77
Q

where does the radial a travel in relation to the thumb

A

travels posterior to the thumb (anatomical snuffbox)

78
Q

deep veins match the arteries and may be paired in the forearm, true or fasle

A

true

79
Q

is the anatomical snuffbox located lateral or medial

A

lateral

80
Q

what is another name for anatominal snuffbox

A

radial fossa

81
Q

what are the 3 tendons of the anatomical snuffbox

A

extensor pollicis longus
extensor pollicis brevis
abductor pollicis longus

82
Q

which of the 3 tendons of the anatomical snuffbox is most ,medial

A

extensor pollicus lonngus

83
Q

true or false: there are 2 tendons for each digit

A

false, 2 tendons for digit II and V

84
Q

what are the tendons in the hand (specifically extensor tendons) surrounded by

A

synovial sheaths on the extensor tendons (synovial sheaths encapsulated by fibrous sheaths)

extensor retinaculum

85
Q

what structures facilitate gliding of tendons on posterior hand

A

extensor retinatculum
synovial sheaths on extensor tendons

86
Q

what are the main contents of the anatomincal snuffbox

A

radial a
branches from the superificial radial n
cephalic vein

87
Q

where does the radial n travel in relation to the anatomincal snuff box

A

superficial branches from the randial n travel superficial to anatomical snuffbox

88
Q

why can you feel your pulse near the thumb

A

the radial a travels in the snuffbox

89
Q

where do the superficial branches of the radial r travel in relation to the snuff box

A

travel superficial to the snuff box

90
Q

cephalic v is drained from what other vein

A

dirsal venous arch

91
Q

what is the most superficial content of the snuff box

A

cephalic vein

92
Q

be able to locate the snuff box and contents

A

.

93
Q

why is a scaphoid fracture dangerous

A

might impact radial artery of the snuff box
(shown by tenderness in anatomical snuffbox)

Anatomy 315 (25 decks)

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