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PT 506 Kinesiology > Wrist and Hand > Flashcards

Wrist and Hand Flashcards

1
Q

Hand Architecture

A

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

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2
Q

Keystone Carpal Bone

A

Capitate

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3
Q

flexion ROM

A

80-90 degrees

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4
Q

Extension ROM

A

70-80 degrees

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5
Q

Radial Deviation ROM

A

20-25 degrees

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6
Q

Ulnar deviation ROM

A

30-35 degrees

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7
Q

Radiocarpal Joint

A

Radius and TFC with scaphoid, lunate, and triquetrum

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8
Q

Lateral Radial facet

A

articulates with scaphoid

46% of RC joint

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9
Q

Medial radial facet

A

articulates with lunate

43% of RC joint

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10
Q

inferior radioulnar disc

A

articulates w/ triquetrum

11% of RC joint

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11
Q

RC joint shape

A

convex carpals on convex radius

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12
Q

Midcarpal joint

A

functional unit
-no isolated capsule
-interrupted multiarticular surface
condyloid

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13
Q

Clinical implication of ligament integrity

A

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

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14
Q

Dorsal Radiocarpal ligament

A

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

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15
Q

Radial and Ulnar Collateral ligaments

A

check rein to frontal plane motions

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16
Q

Volar radiocarpal ligament

A

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

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17
Q

RC joint flexion

A

50 degrees

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18
Q

MC joint flexion

A

35 degrees

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19
Q

Wrist flexion

A

85%

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20
Q

RC extension

A

35 degrees

21
Q

MC extension

A

50 degrees

22
Q

Wrist extension

A

35 degrees

23
Q

Coupled motions at wrist

A

Flexion and ulnar deviation

Extension and radial deviation

24
Q

Ulnar tilt

A

Tilt of radius from styloid to articulation w/ ulna

~25 degrees

25
Q

RC joint arthrokinematics

A

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

26
Q

Midcarpal ulnar joint arthrokinematics

A

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

27
Q

Midcarpal radial joint arthrokinematics

A

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

28
Q

Radial deviation arthrokinematics

A

Proximal row moves palmarly

Distal row moves dorsally

29
Q

Ulnar deviation arthrokinematics

A

Proximal row moves dorsally

Distal row moves palmarly

30
Q

Wrist closed pack

A

45 degrees wrist extension and slight radial deviation

31
Q

Wrist open pack

A

Slight flexion w/ slight ulnar deviation

32
Q

Wrist muscle synergies

A

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

33
Q

Tenodesis

A

Minimal activity wrist extension shortens flexors

Increased passive tension. Gravity flexes wrist to allow positioning, extension flexes fingers to allow gripping

34
Q

CMC joints

A

Plane synovial 2-4 concave on convex

Condyloid saddle 5 2 DF concave on convex

35
Q

CMC 1 joint

A

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

36
Q

CMC ROM

A

15-20 flexion
20-30 extension
70 abduction

37
Q

CMC 2-5 Arthrokinematics

A

Concave on convex

38
Q

MCP joints arthrokinematics

A

2-5 condyloid joint

Concave on convex

39
Q

IP joints

A

Concave on convex

40
Q

Power grip

A

Stability
Large forces
Sphere or cylinder objects

41
Q

Precision Grip

A

Requires contour
delicate action
Egg

42
Q

Precision Pinch

A

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

43
Q

Power pinch (Key)

A

larger forces

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

44
Q

Hook grip

A

No thumb

Requires partial flexion PIP and DIP; static natured for longer periods. FDP primarily

45
Q

Swan-neck deformity

A

RA implicated
Synovitis
Flexed MCP, extended PIP, flexed DIP

46
Q

Boutonniere deformity

A

RA implications

Extended mcp, flexed pip, extended dip

47
Q

Position of rest

A 
wrist extension 20
Ulnar deviation 10
MCP flexion 45
PIP flexion 30
DIP slight flexion
48
Q

Position of immobilization

A

Less wrist extension than rest, more MCP flexion, neutral IP

Minimizes potential for contracture

PT 506 Kinesiology (10 decks)

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