radiocarpalny

The radiocarpal joint, also known as the wrist joint, is a complex articulation that connects the forearm to the hand. It is a synovial joint primarily formed by the distal end of the radius, the articular disc of the distal radioulnar joint, and the proximal row of carpal bones, specifically the scaphoid, lunate, and triquetrum. The ulna, while located in the forearm, does not directly articulate with the carpal bones at the radiocarpal joint; its distal end is separated from the carpal bones by the articular disc.

This joint allows for a wide range of motion, including flexion, extension, radial deviation, and ulnar deviation, as well as circumduction. These movements are crucial for fine motor skills and manipulation of objects. The stability of the radiocarpal joint is maintained by a complex network of ligaments, including the volar and dorsal radiocarpal ligaments, the ulnar and radial collateral ligaments, and the triangular fibrocartilage complex (TFCC). The TFCC plays a significant role in stabilizing the distal radioulnar joint and the radiocarpal joint, absorbing forces transmitted from the hand to the forearm.

Injuries to the radiocarpal joint are common and can include fractures of the distal radius or carpal bones, ligamentous sprains, and dislocations. Conditions such as osteoarthritis and rheumatoid arthritis can also affect the radiocarpal joint, leading to pain, stiffness, and loss of function. Understanding the anatomy and biomechanics of the radiocarpal joint is essential for diagnosing and treating these conditions effectively.