Wrist Joint

Wrist Joint
By Shimin Tan
&
Racheal Cortner
Straight to the Joint
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Radiocarpal joint
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A synovial ellipsoid joint
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Fun Fact:
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Actually a collection of multiple bones and joints
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Ulnar is not part of the wrist joint
Ulnar Collateral Ligament
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From the ulnar styloid process to the triquetrum and pisiform
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Works with the radial collateral ligament
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prevents excessive lateral joint displacement
Radial Collateral Ligament
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From the radial styloid process to the scaphoid and trapezium
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Works with the ulnar collateral ligament
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prevents excessive lateral joint displacement
Palmar Radiocarpal Ligament
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From radius to both rows of carpal bones
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Increases stability
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Ensures the hand follows the forearm in supination.
Dorsal Radiocarpal Ligament
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From the radius to both rows of carpal bones
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Contributes to wrist stability
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Limits flexion/radial deviation of the wrist.
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Ensures hand follows forearm in pronation
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As its fibers descend they angle across the wrist joint to the ulnar side of the wrist attaching to
the posterior surface of the proximal row of carpal bones
Palmar Ulnocarpal Ligament
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A cord-like ligament
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attaches the styloid process of the ulna to the lunate and triquetral
bones
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Stabilize the wrist joint
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limit extension of the wrist
Transverse Carpal Ligament
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The flexor retinaculum of the hand
Strong, square-shaped fibrous band crossing carpal bones transversely,
forming the roof of the fibro-osseous carpal tunnel.
Attaches to hamulus of the hamate and the pisiform, forming two laminae
laterally
Myology of the Wrist
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Seven muscles
○ Flexors
■ FCU
■ FCR
○ Palmaris Longus
○ Extensors
■ ECRL
■ ECRB
■ ECU
Carpal Tunnel
Also called: median nerve compression
A numbness and tingling in the hand and arm caused by a pinched nerve in the wrist
Very common
More than 3M US cases per year
Medically treatable
By a doctor or professional
Requires a medical diagnosis
Rarely requires lab tests or imaging
Medium-term
Often resolves within a few months
Treatment may include rest, ice, wrist splints, cortisone injections, and surgery.
AWESOME WRIST ACTION
References
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http://emedicine.medscape.com/article/1899456-overview
www.mccc.edu/~behrensb/documents/Wrist
http://www.mayoclinic.org/diseases-conditions/carpal-tunnelsyndrome/basics/definition/con-20030332?reDate=10032015
http://www.webmd.com/pain-management/carpal-tunnel/carpal-tunnelsyndrome-topic-overview
http://teachmeanatomy.info/upper-limb/joints/wrist-joint/
http://www.anatomyexpert.com/structure_detail/15323/184/