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Anatomy Exam 2 > L12: Wrist > Flashcards

L12: Wrist Flashcards

1
Q

list the bones of the wrist

A 
scaphoid
lunate
triquetral
pisiform
trapezium
trapezoid
capitate
hamate
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2
Q

lateral to medial proximal row of carpals

A

scaphoid
lunate
triquetral
pisiform

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3
Q

lateral to medial distal row of carpals

A

trapezium
trapezoid
capitate
hamate

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4
Q

forms the snuff box floor

A

scaphoid

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5
Q

scaphoid

A
  1. snuff box floor
  2. most commonly fractured carpal
  3. fractures compromise radial artery in box
  4. articulates w/ radius
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6
Q

lunate

A

articulates w/ radius

in proximal row of carpals

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7
Q

triquetral

A
  1. articulates w/ ulna during extreme ulnar deviation
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8
Q

pisiform

A
  1. sesamoid bone

2. formed w/in tendon of flexor carpi ulnaris

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9
Q

the entire wrist complex is

A

enclosed in a common synovial membrane

articulations are plane joints
perform gliding motions

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10
Q

osteology of wrist and hand

A

8 carpals
5 metacarpals
14 phalanges

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11
Q

radiocarpal joint

A
  1. condyloid synovial jt
  2. 2 degrees of freedom
  3. articular surfaces – radius to carpals
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12
Q

carpals involvement in radiocarpal joint

A
  1. scaphoid - convex
  2. lunate - convex
  3. distal radius - 2 concave fossa
  4. triquetral - convex - only involved during extreme deviation
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13
Q

articular nerve branches

A

any nerve that crosses a joint will send fibers into the joint to relay joint information to the brain

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14
Q

radiocarpal joint ligaments

A
  1. radial collateral lig
  2. ulnar collateral lig
  3. dorsal radiocarpal lig
  4. palmar radiocarpal lig
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15
Q

radiocarpal joint - related mvts

A
  1. some flex/ext

2. ulnar deviation

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16
Q

radiocarpal joint - arteries

A
  1. articular arteries – arising from dorsal and palmar carpal arches
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17
Q

radiocarpal joint - nerves

A
  1. anterior interosseous
  2. posterior interosseous
  3. dorsal and deep branches of ulnar n.
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18
Q

what nerve do the ant/post interosseous nerves arise from?

A

median nerve

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19
Q

midcarpal joint

A

between proximal and distal rows of carpals and in-between the carpals

enclosed w/in synovial capsule

20
Q

midcarpal joint - mvts

A
  1. some flex/ext

2. radial deviation

21
Q

radial deviation at the midcarpal joint

A

especially due to mvt of head of capitate in its socket

22
Q

midcarpal joint - ligaments

A
  1. dorsal ligaments
  2. palmar ligaments
  3. interosseous ligaments
23
Q

midcarpal joint - arteries

A

articular arteries from dorsal/palmar arches

24
Q

midcarpal joint - nerves

A

articular nerves
ant/post interosseous n
dorsal/deep branches of ulnar n.

25
Q

the radiocarpal and midcarpal share the same …..

A

arteries and nerves

26
Q

relate median nerve and palmaris longus tendon

A

nerve is under tendon

27
Q

palmar structure sequence: radial to ulnar

A 
radial art.
flex carpi radialis tendon
median nerve
flex digit superfi tendon
ulnar art.
ulnar n.
flex carpi ulnaris tendon
28
Q

radiocarpal joint injuries

A
  1. colle’s fracture

2. scaphoid fracture (compromises radial art)

29
Q

wrist flexion

A

midcarpal jt

radiocarpal jt

30
Q

wrist extension

A

radiocarpal jt

midcarpal jt

31
Q

radial deviation

A

15-25 degrees

mostly midcarpal jt

32
Q

ulnar deviation

A

30-45 degrees

mostly midcarpal jt

33
Q

ligaments of the wrist, hand and digits

A
  • -collateral lig
  • -carpal lig
  • -metacarpal lig
  • -carpometacarpal lig
  • -palmar lig
  • -intermetacarpal lig
34
Q

tendons that define the anatomical snuff box

A

extensor pollicus longus

ext. pollicus brevis
abd. pollicus longus

35
Q

dorsal-medial line of snuff box

A

ext. pollicus longus

36
Q

palmar border of snuff box

A

ext. pollicus brevis

37
Q

tendon running w/ ext. pollicus brevis of the snuff box

A

abductor pollicus longus

38
Q

what artery lies on top of the scaphoid

A

radial artery

39
Q

floor of the snuff box

A

scaphoid

40
Q

roof of the snuff box

A

branches of superficial radial nerve

41
Q

contents of snuff box

A

radial artery

site for radial pulse

42
Q

abductor pollicus longus - prox/dis attachments

A

posterior proximal ulna
distal radius
interosseous memb.

base of 1st metacarpal

43
Q

abductor pollicus longus - actions, blood supply, nerves

A

abduct thumb and ext.

post. interosseous art.
post. interosseous n C7-8

44
Q

extensor pollicus brevis - prox/dis attachment

A

post. distal radius
interosseous memb.

dorsal proximal phalange of thumb

45
Q

extensor pollicus brevis - action, blood supply, nerves

A

extend prox phalange at mcp and the carpometacarpal jt

post. interosseous art.
post. interosseous n C7-8

46
Q

extensor pollicus longus - prox/dis attachment

A

post. mid ulna
interosseous memb.

dorsal distal phalanx of thumb

47
Q

extensor pollicus longus - action, blood supply, nerves

A

extend distal phalanx at IP jt
extend mcp jt and carpometacarpal jt

post. interosseous art. and perforating ant. interosseous art.
post. interosseous n C7-8

Anatomy Exam 2 (9 decks)

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