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Movement Science > Wrist/Hand > Flashcards

Wrist/Hand Flashcards

1
Q

Wrist Complex

A

Radiocarpal joint
Midcarpal Joints
Flx: 65-85
Extt: 60-85
-biaxial

-control length-tension relationship in hand muscles
-grip

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2
Q

Radiocarpal Joint Structure

A

-radius and TFCC proximally
-scaphoid and latteral radius
-lunate and medial radius
-triquetum and TFCC

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3
Q

TFCC Attachments

A

-connected medially via dorsal and volar radioulnar lig
-connects distally to ECU tendon

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4
Q

Proximal Carpal Row

A

-scaphoid, lunate, triquetrum
-connected by scapholunate interossesous lig and lynotriquetral interosseous lig
-scapoid and lunate get 80% of axial load; tfcc 20%

-pisiform proximal but acts as sesamoid to increase MA for FCU

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5
Q

Ulna Length Functions

A

Short Ulna= ulnar negative variance; keinbock’s disease (necrosis of lunate after fratcure)

Long ulna= Ulnar positive variance; radial fracure; impingement of TFCC

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6
Q

FCU Wrist Exception

A

-does not provide stability to midcarpal dispite crossing RC joint
-attaches to 5th meta, pisiform, and hook of hamate

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7
Q

Midcarpal Joint Structure

A

Proximal row and Distal row of carpals

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8
Q

Volar Carpal Ligaments

A

-stronger/thicker

Extrinsic Lig: radio carpal and ulnocarpal complex

Intrinsic lig: Scapholunate interosseous lig and Lunotriquetral interosseous lig

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9
Q

Dorsal Carpal Ligaments

A

-thin/weaker
-taut with flx

Dorsal radiocarpal lig: radius to triquetrum
Dorsal intercarpal lig: horizontal from triquetrum

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10
Q

Capitate

A

-keystone of wrist
-biggest carpal
-attaches to: Scaphoid, lunate, trapezoid, hamate, 1, 2, 3rd metacarparls

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11
Q

Wrist Flexion

A

-65-85 ROM
-Proximal carpals flex, distal row and scaphoid move ant

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12
Q

Wrist Extension

A

-60-85 ROM
-functional 20
-distal carpals glide post, distal row and scaphoid move on lunate, scaphoid and lunate lock

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13
Q

Wrist Radial Dev

A

-20 ROM
-capals slide ulnarly
-flx of proximal
-ext of distal

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14
Q

Wrist Ulnar Dec

A

-30 ROM
-functional : 10
-carpals slide radially
-flx of distal
-ext of proximal

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15
Q

Closed Packed Wrist

A

-full extension

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16
Q

Loose Packed Wrist

A

-full flexion

17
Q

DISI

A

-dorsal intercalated segmental instability

-scapholunate lig tears, triquetrum pulls lunate dorsally into ext

18
Q

VISI

A

-ventral intercalatted segmental instability

-lunotriquetral lig tears, scaphoid pulls lunate ventrally into flx

19
Q

Carpometatarsal Joint

A

-increases mobility from radial to ulnar

-2nd-4th: plane joints
-5th: saddle joint; 2 degrees

20
Q

Proximal Arch of Hand

A

-formed by carpal bones
-fixed

21
Q

Distal Arch of Hand

A

-formed by metacarpals
-mobile

22
Q

Longitudinal Arch of Hand

A

-proximal to distal
-mobile

23
Q

Metacarphalangeal Joint

A

-ROM increases radially to ulnarly

-convex metalcarpal and concave phalanges
-condyloid joint; 2 degrees
-volar plates: increases stability, reisist forces

Collateral Ligament Proper: top to bottom, taut in flx
Accessory Collatteral Lig: bottom to ant; taut in extension

24
Q

Interphalangeal Joints

A

-synovial
-base of phalynx has 2 shallow concaves

25
Q

Flexor Grasp

A

-greater witth ulnar dev

Larger tool: larger force
Smaller grip: smaller force with more ROM

26
Q

Intrinsic Plus

A

-lumbricals and PAD/DAB activated and NOT flexors/extensors

-sock puppet

27
Q

Intrinsic Minus

A

-flexors/extensors and NO lumbricals and interossei

-half heart

28
Q

CMC of Thumb

A

-trapeziometacarpal
-saddle joiont; 2 deg
-closed packed in AB/AD

Flx: 53deg
AB/AD: 42deg
Axial: 17

29
Q

MP Thumb

A

-condyloid; 2 deg
-adds flex to opposition
-functional: 45

flx: half of others
ad/ab: minimal from sesamoids (12yrs)

30
Q

Thumb Extrinsics

A

-snuff box: apl, epb, epl
-fpl

31
Q

Prehension

A

-grasping

32
Q

Power Grip

A

-open hand, position fingers, grasp
-dynamic

Cylindrical, spherical, hook, lateral prehension (btwn 2 and 3rd)

33
Q

Prescision Handling

A

-no static phase

Pad to pad, tip to tip, pad to side

Movement Science (13 decks)

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