The intercarpal joints may be subdivided into three sets:
- 1. The Articulations of the Proximal Row of Carpal Bones.These are arthrodial joints. The navicular, lunate, and triangular are connected by dorsal, volar, and interosseous ligaments.
- 2. The Articulations of the Distal Row of Carpal Bones.These also are arthrodial joints; the bones are connected by dorsal, volar, and interosseous ligaments.
- 3. The Articulations of the Two Rows with each Other. The joint between the navicular, lunate, and triangular on the one hand, and the second row of carpal bones on the other, is named the midcarpal joint, and is made up of three distinct portions: in the center the head of the capitate and the superior surface of the hamate articulate with the deep cup-shaped cavity formed by the navicular and lunate, and constitute a sort of ball-and-socket joint. On the radial side the greater and lesser multangulars articulate with the navicular, and on the ulnar side the hamate articulates with the triangular, forming gliding joints. The ligaments are: volar, dorsal, ulnar and radial collateral.