ulnocarpal

Ulnocarpal refers to the region of the wrist that involves the ulna and the carpal bones. The ulna is one of the two long bones in the forearm, located on the pinky finger side. The carpal bones are the eight small bones that form the wrist's base, connecting the forearm to the hand. The ulnocarpal joint, specifically the articulation between the distal ulna and the carpal bones, is a crucial component of wrist function. This joint is not a direct bony articulation but rather a complex structure that includes the triangular fibrocartilage complex (TFCC). The TFCC is a cartilaginous and ligamentous structure that plays a vital role in stabilizing the distal radioulnar joint and transmitting forces from the carpus to the ulna. The ulnocarpal joint is essential for a wide range of wrist movements, including flexion, extension, ulnar deviation, and radial deviation, as well as contributing to forearm rotation (pronation and supination). Injuries or degenerative conditions affecting the ulnocarpal structures can lead to pain, weakness, and limited mobility in the wrist.