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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
what are the functions of the extensor digitorem
extension at the wrist, MCP, PIP and DIP
26
the extensor digitorem extends just the wrist and MCP
false, also the PIP and DIP
27
what four muscles of the posterior compartment share the common origin of the lateral humeral epicondyle
extensor carpi ulnaris extensor digiti minimi extensor digitorem extensor carpi ulnaris
28
what is the origin of the extensor carpi ulnaris
lateral humeral epicondyle (common origin)
29
what is the insertion of the extensor carpi ulnaris
base of metacarpa V (base of the 5th metacarpal)
30
what is the function of the extensor carpi ulnaris
extension and adduction (ulnar deviation) of the hand at the wrist
31
what is the origin of the extensor digiti minimi
lateral humeral epicondyle (common origin)
32
what is the insertion of the extensor digiti minimi
extensor expansion hood of digit V (5th digit)
33
what is the function of extensor digiti minimi
accessory/independant extension of digit V
34
be able to locate extensor carpi ulnaris and digiti mnini.
35
what are the proximal attachements of the deep layer of the posterior compartment of the arm
posterolateral ulna and interosseus membrane
36
what is the origin of the extensor pollicis longus
posterolateral ulna and interosseus membrane
37
what is the insertion of the extensor pollicis longus
distal phalanx digit I (thumb)
38
what is the origin of the extensor pollicus brevis
posterolateral ulna and interosseus membrane
39
what is the insertion of the extensor pollicus brevis
proximal phalanx of digit 1 (thumb)
40
which muscle inserts on the proximal phalanx of digit 1 (thumb)
extensor pollicus brevis
41
what is the origin of the extensor indivis
posterolateral ulna and interosseus membrane
42
what is the isnertion of the extensor indicis
distal phalanx of digit II (index)
43
what is the function of the extensor indicis
accessory/independant extension of index finger (digit II)
44
what is the origin of the abductor pollicus longus
posterolateral ulna and interosseus membrane
45
what is the insertion of the abductor pollicus longus
base of metacarpal I (thumb)
46
what is the function of the abductor pollicus longus
thumb abduction
47
what is the function of the dorsal tubercle of the radius
serves as a pulley for extensor pollicus longus
48
explain the brevis sandwihich of the hand
brevis tendon between 2 longus tendons medial 2= thumb extensors lateral 1= thumb abductor
49
what does the median n (C6-T1) innervate on the anterior compartment of the forearm
to the anterior compartment of the forearm mm EXCEPT FCU and medial 1/2 FDP
50
what does the anterior interosseus n supply on the anterior forearm
the deeper muscles : FDP(lateral 1/2), FPL, pronator quadratus
51
what does the ulnar n supply on the anterior compartment
FCU and medial half of FDP
52
what is the sensory inneration of the anterior compartment of the forearm
lateral antebrachial cutaneous n (from musulo) superfial radial median ulnar medial anterbrachial cutaneus (from medial cord)
53
know the graphic of the cuteanous supply of the anterior forearm
/.
54
motor innervation of posterior compartment of forearm comes from what nerve
radial (c5-t1)
55
deep branch of the radial n pierces through what muscle
supinator
56
radial n itself supplies what muscles on the psoterior forearm
anconeus brachioradialis ECRL/B
57
what does radial n branch into on the posterior forearm
deep branch (as psoterior interosseus) superficial radial n
58
superficial radial n is deep to what muscle
brachioradialis
59
true or false: superficial radial n provides both sensory and motor inneravtion
false, only sensory
60
true or false: the deep branch of radial (as posterior interosseus) innervates ALL the muscles of the psoterior compartment of forearm
false, all of the other posterior msucles taht are not anconeus, brachioradialis and ECRL/B
61
what is the main sensory inneravtion of the psoterior compartment of the forearm
medial and lateral antebrachial cutaneus n
62
the anastomoses around the elbow are between what types of arteries
recurrent and collateral arteries
63
radial collateral a anastomoses with what artery at the elbow
radial reccurent a
64
the middle collateral a anastomoses with what artery at the elbow
recurrent interosseus
65
the inferior ulnar collateral a anastomoses with what a at the elbow
anterior ulnar reccurent
66
the superior ulnar collarteral a anastomses with what a at the elbow
posterior ulnar reccurent a
67
what does the brachial artery split into after the cubital fossa
radial and ulnar a
68
the deep brachial artery goes posteriorly with what other vessel
radial n
69
what are the terminal brancges of the deep brachial a
middle collateral and radial collateral
70
the terminal branches of the deep brachial a do not go past what structurew
elbow
71
where does the common interosseus branch off of
ulnar a
72
where does the posterior interosseus a come from
common branch
73
what are the 2 branches off the common interosseus (from ulnar)
posterior and anterior interosseus ARTERIES
74
what does the posterior interosseus a supply
muscles of the deep posterior comparttment
75
what does the anterior interosseus a supply
supplies deep muscles of the anterior compartment
76
true or false: the posterior interosseus a supplies the deep posterior compartment
true
77
where does the radial a travel in relation to the thumb
travels posterior to the thumb (anatomical snuffbox)
78
deep veins match the arteries and may be paired in the forearm, true or fasle
true
79
is the anatomical snuffbox located lateral or medial
lateral
80
what is another name for anatominal snuffbox
radial fossa
81
what are the 3 tendons of the anatomical snuffbox
extensor pollicis longus extensor pollicis brevis abductor pollicis longus
82
which of the 3 tendons of the anatomical snuffbox is most ,medial
extensor pollicus lonngus
83
true or false: there are 2 tendons for each digit
false, 2 tendons for digit II and V
84
what are the tendons in the hand (specifically extensor tendons) surrounded by
synovial sheaths on the extensor tendons (synovial sheaths encapsulated by fibrous sheaths) extensor retinaculum
85
what structures facilitate gliding of tendons on posterior hand
extensor retinatculum synovial sheaths on extensor tendons
86
what are the main contents of the anatomincal snuffbox
radial a branches from the superificial radial n cephalic vein
87
where does the radial n travel in relation to the anatomincal snuff box
superficial branches from the randial n travel superficial to anatomical snuffbox
88
why can you feel your pulse near the thumb
the radial a travels in the snuffbox
89
where do the superficial branches of the radial r travel in relation to the snuff box
travel superficial to the snuff box
90
cephalic v is drained from what other vein
dirsal venous arch
91
what is the most superficial content of the snuff box
cephalic vein
92
be able to locate the snuff box and contents
.
93
why is a scaphoid fracture dangerous
might impact radial artery of the snuff box (shown by tenderness in anatomical snuffbox)

Anatomy 315 (25 decks)

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