Upper Limb - Wrist/Hand - Joints/LigamentsThis is a featured page


Wrist / Hand

Wrist (radiocarpal) joint

  • Is a synovial condylar joint formed superiorly by the radius and the articular disk and inferiorly by the proximal row of carpal bones (scaphoid, lunate, and rarely triquetrum),exclusive of the pisiform.
  • Has a capsule that is strengthened by radial and ulnar collateral ligaments and dorsal and palmar radiocarpal ligaments.
  • Allows flexion and extension, abduction and adduction, and circumduction.

Midcarpal joint

  • Forms a synovial plane joint between the proximal and distal rows of carpal bones and allows
  • gliding and sliding movements.
  • Is a compound articulation: laterally, the scaphoid articulates with the trapezium and trapezoid, forming a plane joint ; and medially, the scaphoid, lunate, and triquetrum articulate with the capitate and hamate, forming a condylar (ellipsoidal type) joint.

Carpometacarpal joints

  • Form synovial saddle (sellar) joints between the carpal bone (trapezium) and the first metacarpal bone, allowing flexion and extension, abduction and adduction, and circumduction.
  • Also form plane joints between the carpal bones and the medial four metacarpal bones, allowing a simple gliding movement.

Metacarpophalangeal joints

  • Are condyloid joints, supported by a palmar ligament and two collateral ligaments, and allow flexion and extension and abduction and adduction.

Interphalangeal joints

  • Are hinge joints, supported by a palmar ligament and two collateral ligaments, and allow
    flexion and extension.

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AndyC
AndyC 		Latest page update: made by AndyC , Jul 5 2010, 8:14 AM EDT (about this update About This Update AndyC Edited by AndyC

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