Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Kines Exam 3 > Wrist Joint > Flashcards

Wrist Joint Flashcards

1
Q

function of the wrist joint

A
  • To provide a mobile and stable foundation for hand

- Control length-tension for hand musculature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

the upper extremity functions to

A

position the hand in space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

joints of the wrist

A

radiocarpal & mid-carpal (functional)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

arthrokinematics of radiocarpal

A

concave - convex rule

moves in the opposite direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

arthrokinematics of mid carpal joint

A

gliding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

flexion ROM

A

85 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

extension ROM

A

70-80 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

ulnar deviation ROM

A

30-35 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

radial deviation ROM

A

20-25 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

radius and radioulnar disk make up the

A

triangular fibrocartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

radioulnar disk lies between

A

the radius & ulna at the base of the ulna –> this is why there is no “ulnacarpal” joints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

functionally, _______ contributes to both proximal & distal carpals

A

scaphoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

pisiform

A

proximal carpal
non-articular
increases the moment arm of FCU (b/c FCU is strung thru the pisiform)
sesamoid bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

carpals have ____ muscular attachments EXCEPT FOR -______

A

No;

pisiform & hamate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Only muscle crossing the radio carpal joint that attaches to the proximal row is:

A

flexor carpi ulnaris

attaches to pisiform, hamate & base of 5th metatarsal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

lateral facet

A

46% articulation to scaphoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

medial facet

A

43% articulation to lunate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

inferior disk

A

11% articulation to triquetrum (inferior ulnar disk)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

triangular fibrocartilage complex TFCC

A
  • continuous with the articular surface of the radius, covers the ulnar head and forms the articular surface on the ulnar side
  • this is why you have more ulnar deviation than radial deviation —-> there isn’t as much bone limiting movement
  • this is the soft spot on the posterior aspect of the wrist
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

the triangular fibrocartilage complex TFCC consists of

A 
articular disk (triangular fibrocartilage),
meniscus homologue,
ulnocarpal (ulnar collateral) ligament,
dorsal & volar radioulnar ligament,
floor of ECU sheath
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

TFCC is the main stabilizer of:

A

distal radioulnar joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

TFCC acts as a buttress to support:

A

proximal carpal row

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

TFCC stabilizes the ulnar _____

A

head

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

TFCC contributes to the ______ stability

A

ulnarcarpal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

TFCC distributes:

A

compressive loads

80% to radius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

the TFCC excised increased loads on ____ from _____(%) to ____(%)

A

radius

80% to 94%

27
Q

TFCC ______ congruency

A

increases

28
Q

radiocarpal stability

A

loose, stong capsule reinforced by ligaments that extend to mid carpal joint

29
Q

midcarpal joint occurs between

A 
proximal row (triquetrium, lunate, scaphoid) 
& the distal row  (trapezium, trapezoid, capitate, hamate)
30
Q

midcarpal joint has

A

intercarpal joint capsule &

numerous ligaments

31
Q

ligaments of the midcarpal joint

A
  • provide primary stability and support
  • guide motion
  • transfer forces
32
Q

the anterior wrist ligaments are more _______

A

complex

33
Q

volar radiocarpal ligament

A

ANTERIOR WRIST LIGAMENT
***most important for motion & stability
can be divided into separate bands

34
Q

bands of the volar radiocarpal ligament

A

radiolunate ligament
radiocapitate ligament
radiotriquetral ligament
radioscaphoid ligament

35
Q

ulnocarpal ligament arises from

A

the TFCC

at the articular disk & base of the ulnar styloid

36
Q

ulnocarpal ligament attaches to

A

triquetrum, capitate, & lunate carpals

37
Q

Ulnocarpal ligament reinforces

A

the ulnar side of the wrist

38
Q

ulnocarpal ligament is on the ___ side

A

anterior

39
Q

volar radiocarpal ligament is on the _____ side

A

anterior

40
Q

intercarpal ligament is on the _____ side

A

anterior

41
Q

intercarpal ligaments prevent

A

diastasis of the carpals

diastasis- separation, pulling apart

42
Q

intercarpal ligament connects _______ to ________ to help _______ the joint capsule

A

the dorsal proximal row of the carpals;
the distal row of the carpals;
strengthen

43
Q

dorsal radiocarpal ligament is on the ____ side

A

posterior

44
Q

dorsal radiocarpal ligament is a ________ ligament

A

extrinsic

45
Q

dorsal radiocarpal ligaments attaches

A

from the posterior edge of the distal radius
to the scaphoid, triquetrum, lunate, and slips to the capitate

these ligaments are called - radiolunate, radiotriquetral, and radiocapitate ligaments

46
Q

ulnar collateral ligaments attachment

A

POSTERIOR

ulna styloid process —> to the pisiform & triquetrum

47
Q

radial collateral ligaments attachments

A

POSTERIOR

radial styloid process –> to the scaphoid, trapezium, to the 1st metacarpal

48
Q

intrinsic ligaments of the posterior wrist

A

dorsal intercarpal
trapeziotrapezoid
trapeziocapitate
capitohamate

49
Q

radiocarpal motion

A

gliding of convex proximal carpals over concave radius & disk

50
Q

WRIST JOINT MOTION

- in flexion (moving towards neutral)

A

distal carpals glide in same direction on fixed proximal carpals

51
Q

Wrist joint motion

- in neutral

A

scaphoid & capitate are closed packed

52
Q

wrist joint motion

- in extension after neutral but BEFORE 45 degrees

A

combined distal carpals and scaphoid extending together

53
Q

wrist joint motion

- in extension at 45 deg

A

scaphoid & lunate are closed packed

54
Q

wrist joint motion

- in extension greater than 45 deg

A

carpals all glide on the radius & radioulnar (in the opposite direction)

55
Q

wrist joint motion- in flexion - scaphoid does what?

A

contributes to both rows

reverse the extension sequence for flexion

56
Q

radial deviation- the ____ row moves radially on the ____ until the carpals ____

A

distal;
proximal;
lock

57
Q

radial deviation- at the end of the range, both rows moving as ____, until ulnar ligament is _____ & ______ impacts the radius

A

1;
taut;
scaphoid

58
Q

radial deviation is predominant at the

A

midcarpal joint

59
Q

ulnar deviation occurs predominantly as _________

A

radiocarpal motion

60
Q

the maximum movement for radial deviation & ulnar deviation movement is at ________

A

neutral

61
Q

wrist instability secondary to ligamentous disruption:

dorsal instability DISI

A
  • maintained extension of lunate
  • capitate flexion as compensation
  • zig zag pattern
  • usually secondary to dissociation between lunate and scaphoid
62
Q

wrist instability secondary to ligamentous disruption:

volar instability VISI

A
  • secondary to ligamentous disruption between lunate and triquetrium (lunate/scaphoid flex, triquetrum/distal row extend)
  • normally the distal radius, lunate, capitate, and third metacarpal are colinear
63
Q

which bone on the wrist is most susceptible to fracture?

A

scaphoid is susceptible to fracture

- poor healing properties secondary to poor vascular supply

Kines Exam 3 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions