Intercarpal joints

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Intercarpal Joints

The intercarpal joints are a group of synovial joints located between the individual carpal bones in the wrist. These joints play a crucial role in the complex movements of the wrist, allowing for a range of motions including flexion, extension, abduction, and adduction.

Anatomy

The intercarpal joints are divided into two main groups:

• The proximal row of carpal bones, which includes the scaphoid, lunate, triquetrum, and pisiform.
• The distal row of carpal bones, which includes the trapezium, trapezoid, capitate, and hamate.

Proximal Row

The proximal row of carpal bones articulates with the radius and the articular disc of the ulna at the radiocarpal joint. The individual bones in this row are connected by the following intercarpal joints:

• Scapholunate joint
• Lunotriquetral joint

Distal Row

The distal row of carpal bones articulates with the metacarpal bones at the carpometacarpal joints. The individual bones in this row are connected by the following intercarpal joints:

• Trapeziotrapezoid joint
• Trapeziocapitate joint
• Capitohamate joint

Ligaments

The stability of the intercarpal joints is maintained by several ligaments, including:

• Dorsal intercarpal ligament
• Palmar intercarpal ligament
• Interosseous intercarpal ligaments

Function

The intercarpal joints contribute to the overall flexibility and dexterity of the wrist. They allow for the fine-tuned movements necessary for various activities such as gripping, typing, and other precise hand functions. The coordinated movement of these joints is essential for the proper functioning of the hand and wrist.

Clinical Significance

Injuries or disorders affecting the intercarpal joints can lead to significant impairment of wrist function. Common conditions include:

• Intercarpal instability
• Arthritis of the intercarpal joints
• Carpal tunnel syndrome

See Also

• Radiocarpal joint
• Carpometacarpal joint
• Hand
• Wrist