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In human anatomy, the wrist is variously defined as (1) the carpus or carpal bones, the complex of eight bones forming the proximal skeletal segment of the hand; [1] [2] (2) the wrist joint or radiocarpal joint, the joint between the radius and the carpus [2] and; (3) the anatomical region surrounding the carpus including the distal parts of the bones of the forearm and the proximal parts of ...
In tetrapods, the carpus is the sole cluster of bones in the wrist between the radius and ulna and the metacarpus. The bones of the carpus do not belong to individual fingers (or toes in quadrupeds), whereas those of the metacarpus do. The corresponding part of the foot is the tarsus. The carpal bones allow the wrist to move and rotate ...
Joints of the hand, X-ray. The bones in each carpal row interlock with each other and each row can therefore be considered a single joint. In the proximal row a limited degree of mobility is possible, but the bones of the distal row are connected to each other and to the metacarpal bones by strong ligaments that make this row and the metacarpus a functional entity.
Optimal wrist function requires stability of the carpal components in all joint positions under static and dynamic conditions. Stability is achieved by a sophisticated geometry of articular surfaces and intricate system of ligaments, retinacula , and tendons , which also determine the relative motion of the carpal bones.
The capitate bone is a bone in the human wrist found in the center of the carpal bone region, located at the distal end of the radius and ulna bones. It articulates with the third metacarpal bone (the middle finger) and forms the third carpometacarpal joint. The capitate bone is the largest of the carpal bones in the human hand.
Fractures of the wrist from a fall usually involve the bone called the radius. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach ...
The synovial membranes of the wrist and carpus are thus seen to be five in number: [citation needed] The first passes from the lower end of the ulnar to the ulnar notch of the radius, and lines the upper surface of the articular disk. The second passes from the articular disk and the lower end of the radius above, to the bones of the first row ...
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