intercarpale

Intercarpale refers to the joints between the carpal bones of the wrist, forming a network of small plane synovial joints that contribute to wrist mobility. The carpal bones are arranged in two rows: proximal row (scaphoid, lunate, triquetrum, pisiform) and distal row (trapezium, trapezoid, capitate, hamate). Intercarpal joints connect adjacent carpals both within a row and across the rows, and are stabilized by a system of dorsal and palmar intercarpal ligaments as well as interosseous ligaments between neighboring bones.

Anatomy and function: the intercarpal joints include numerous articulations between neighboring carpal bones. They are primarily plane joints capable of small gliding movements, which supplement the movements of the radiocarpal joint to produce the overall range of wrist motion. The ligamental support distributes load and helps maintain carpal alignment during motion.

Clinical relevance: injuries to the intercarpal ligaments can lead to instability, such as lunotriquetral or scapholunate dissociation. Degenerative changes may produce intercarpal osteoarthritis, presenting with shallow wrist pain and reduced motion. Fractures of carpal bones can involve adjacent intercarpal joints, potentially altering carpal alignment and function.

See also: radiocarpal joint, carpal bones.