![]() It acts to prevent excessive ulnar (medial) deviation of the hand. Radial collateral - Runs from the radial styloid process to the scaphoid and trapezium.It acts to prevent excessive radial (lateral) deviation of the hand. Ulnar collateral - Runs from the ulnar styloid process to the triquetrum and pisiform.It contributes to the stability of the wrist, but also ensures that the hand follows the forearm during pronation. It passes from the radius to both rows of carpal bones. Dorsal radiocarpal - Found on the dorsum (posterior) side of the hand.Its function, apart from increasing stability, is to ensure that the hand follows the forearm during supination. Palmar radiocarpal - Found on the palmar (anterior) side of the hand.Fig 1 - Articular surfaces of the wrist joint. Radial collateral – Runs from the radial styloid process to the scaphoid and trapezium.Ulnar collateral – Runs from the ulnar styloid process to the triquetrum and pisiform.Dorsal radiocarpal – Found on the dorsum (posterior) side of the hand.Palmar radiocarpal – Found on the palmar (anterior) side of the hand.There are four ligaments of note in the wrist joint, one for each side of the joint The internal layer is comprised of a synovial membrane, secreting synovial fluid which lubricates the joint. The fibrous outer layer attaches to the radius, ulna and the proximal row of the carpal bones. Like any synovial joint, the capsule is dual layered. Fig 1 – Articular surfaces of the wrist joint.
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