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Wrist Joint Summary from Clinical Kinesiology and Anatomy
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Clinical Kinesiology and Anatomy of the wrist joint
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Wrist Joint PTA1005 Kinesiology 1JOINT STRUCTURE
Made up of two joints:
oRadiocarpal joint: distal end of radius and radioulnar disk proximally and the scaphoid, lunate, and
triquetrum distally
oSynovial, condyloid joint- concave distal end of the radius and articular disk articulating with the convex
scaphoid, lunate, and triquetrum
oConvex shaped distal row of carpal bones moves in a direction that is opposite to the hand
oBiaxial: allows flexion/extension and ulnar/ radial deviation
Midcarpal joint is located between the two rows of carpal bones
Intercarpal joints are located between the carpal bones in each individual row
Shape of these joints are irregular, classified as nonaxial plane joints
oAllow gliding motions
Carpometacarpal (CMC) joints: between the distal row of carpal bones and proximal end of the
metacarpal bones
JOINT MOTIONS
Preferred Terminology Motion of Position
Flexion Anterior from anatomical position
Neutral Anatomical position
Extension Posterior from anatomical position
Radial deviation Lateral from anatomical position
Ulnar deviation Medial from anatomical position
Flexion/ Extension occur in sagittal plane around frontal axis Radial/ Ulnar deviation occur in the frontal plane
around a sagittal axis
Due to tension of ligaments and joint capsule, the end feel for all wrist motions, except radial deviation
is soft tissue stretch
oEnd feel for radial deviation is hard due to bony contact between radial styloid process and the scaphoid
bone
ARTHROKINEMATICS
This joint is a convex on concave articulation where the convex-shaped proximal row of carpal hones
moves in the opposite direction of the hand motion
oWrist flexion: carpals glide posteriorly on the radius and articular disk
oWrist extension: they glide anteriorly
oRadial deviation: they glide in a medial direction, and with ulnar deviation, they glide in the lateral
direction
BONES AND LANDMARKS
Carpal bones consist of two rows of four bones each
oProximal row: scaphoid, lunate, triquetrum, pisiform
oDistal row: (lateral to medial) trapezium, trapezoid, capitate, and hamate
“Some Lovers Try Positions That They Can’t Handle”
Styloid process: Distal projection on the lateral side of the radius and distal medial posterior side of the
ulna, providing attachments for the collateral ligaments Powered by TCPDF (www.tcpdf.org)
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