Radiocarpal joint

The radiocarpal joint is a major synovial joint of the wrist and is an example of a condyloid joint

The distal radius broadens to possess a large surface, and has a radial styloid process that usually extends 9-12 mm distal to the articular surface of the ulnar. This results in an ulnar slant and palmar inclination at the radiocarpal joint.

The joint occurs proximally between the distal end of the radius and the articular disc of the distal radioulnar joint, and distally by the proximal carpal row (the scaphoid, lunate and triquetral bones).

  • flexion
  • extension
  • adduction / ulnar deviation
  • abduction / radial deviation
  • circumduction

Key features of the radiocarpal joint:

Multiple separate ligaments stabilise the adjacent carpal bones to the distal radius.

  • radial collateral ligament: attach to the styloid process
  • radioscaphocapitate ligament
  • radiolunate ligament
  • radioscapholunate ligament
  • radioscaphoid ligament
  • radiolunate ligament
  • radiotriquetral ligament

The tendon of the brachioradialis muscle attaches to the styloid process.

Ulnar variance refers to the relative positioning of the ulnar and radial articular surfaces at the level of the radiolunate articulation.

  • neutral: same level
  • positive: ulna is distal to the radius
  • negative: ulna is proximal to the radius
Upper limb anatomy
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Article information

rID: 33584
Section: Anatomy
Tag: wrist
Synonyms or Alternate Spellings:
  • wrist joint

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