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The radiocarpal joint is a synovial joint thatâs also found in the wrist. The radius articulates with the first row of carpal bones, except for the pisiform. It has a fibrous joint capsule thatâs attached to that distal end of the radius and the ulna and to the carpal bones.
Hand and wrist surgeons define the wrist as the carpal bones that exist between the end of your forearm (radius and ulna bones, where they meet near the hand) and the actual hand bones, or metacarpals. Bone is made up of layers â cortical, cancellous bone, and marrow. The wrist joint that most people (and most doctors) think of when referring to âthe wristâ is formed at the junction of the radius and ulna and the eight small carpal bones.