Wrist and Hand Flashcards Preview

PT 506 Kinesiology > Wrist and Hand > Flashcards

Flashcards in Wrist and Hand Deck (48):
1

Hand Architecture

Central Column/ Pillar effect
Stable at CMC 3
Flanked by mobile segments

2

Keystone Carpal Bone

Capitate

3

flexion ROM

80-90 degrees

4

Extension ROM

70-80 degrees

5

Radial Deviation ROM

20-25 degrees

6

Ulnar deviation ROM

30-35 degrees

7

Radiocarpal Joint

Radius and TFC with scaphoid, lunate, and triquetrum

8

Lateral Radial facet

articulates with scaphoid
46% of RC joint

9

Medial radial facet

articulates with lunate
43% of RC joint

10

inferior radioulnar disc

articulates w/ triquetrum
11% of RC joint

11

RC joint shape

convex carpals on convex radius

12

Midcarpal joint

functional unit
-no isolated capsule
-interrupted multiarticular surface
condyloid

13

Clinical implication of ligament integrity

weaked palmar area near the lunate= palmar dislocation of lunate most common
Ganglion cysts on proximal pole of the scaphoid

14

Dorsal Radiocarpal ligament

Thickening of capsule
Lunate and radius contact
Check rein to end range flexion

15

Radial and Ulnar Collateral ligaments

check rein to frontal plane motions

16

Volar radiocarpal ligament

most important of all ligaments for stability and passive motion contribution
3 bands

17

RC joint flexion

50 degrees

18

MC joint flexion

35 degrees

19

Wrist flexion

85%

20

RC extension

35 degrees

21

MC extension

50 degrees

22

Wrist extension

35 degrees

23

Coupled motions at wrist

Flexion and ulnar deviation
Extension and radial deviation

24

Ulnar tilt

Tilt of radius from styloid to articulation w/ ulna
~25 degrees

25

RC joint arthrokinematics

Flexion: palmar roll dorsal glide
Extension: dorsal roll palmar glide
Radial deviatoin: radial roll ulnar glide
Ulnar deviation: Ulnar roll radial glide

26

Midcarpal ulnar joint arthrokinematics

Convex on Concave in both planes
Flexion: palmar roll and dorsal glide
Extension: dorsal roll and palmar glide

27

Midcarpal radial joint arthrokinematics

Concave on convex in both planes
Flexion: palmar roll and glide
Extension: dorsal roll and glide

28

Radial deviation arthrokinematics

Proximal row moves palmarly
Distal row moves dorsally

29

Ulnar deviation arthrokinematics

Proximal row moves dorsally
Distal row moves palmarly

30

Wrist closed pack

45 degrees wrist extension and slight radial deviation

31

Wrist open pack

Slight flexion w/ slight ulnar deviation

32

Wrist muscle synergies

ECR and ED: Substitution if weak ECR
FCU and ADM: FCU stabilizes pisiform
ECU and EPLB: ECU maintains neutral during thumb ext

33

Tenodesis

Minimal activity wrist extension shortens flexors
Increased passive tension. Gravity flexes wrist to allow positioning, extension flexes fingers to allow gripping

34

CMC joints

Plane synovial 2-4 concave on convex
Condyloid saddle 5 2 DF concave on convex

35

CMC 1 joint

saddle biaxial joint b/w 1 metacarpal and trapezium
trapezium concave saggital plane=convex on concave
trapezium convex frontal plane=concave on convex

36

CMC ROM

15-20 flexion
20-30 extension
70 abduction

37

CMC 2-5 Arthrokinematics

Concave on convex

38

MCP joints arthrokinematics

2-5 condyloid joint
Concave on convex

39

IP joints

Concave on convex

40

Power grip

Stability
Large forces
Sphere or cylinder objects

41

Precision Grip

Requires contour
delicate action
Egg

42

Precision Pinch

Fine control between index and thumb
tip-to-tip
pulp-to-pulp

43

Power pinch (Key)

larger forces
stability of object occurs b/w thumb and lateral border of index finger

44

Hook grip

No thumb
Requires partial flexion PIP and DIP; static natured for longer periods. FDP primarily

45

Swan-neck deformity

RA implicated
Synovitis
Flexed MCP, extended PIP, flexed DIP

46

Boutonniere deformity

RA implications
Extended mcp, flexed pip, extended dip

47

Position of rest

wrist extension 20
Ulnar deviation 10
MCP flexion 45
PIP flexion 30
DIP slight flexion

48

Position of immobilization

Less wrist extension than rest, more MCP flexion, neutral IP
Minimizes potential for contracture