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;Behnke 2006, p 76. "The wrist contains eight bones, roughly aligned in two rows, known as the carpal bones."Moore 2006, p 485. "The wrist (carpus), the proximal segment of the hand, is a complex of eight carpal bones. The carpus articulates proximally with the forearm at the wrist joint and distally with the five metacarpals. The joints formed by the carpus include the wrist (radiocarpal joint), intercarpal, carpometacarpal and intermetacarpal joints. Augmenting movement at the wrist joint, the rows of carpals glide on each other 1 " (2) the wrist joint or radiocarpal joint, the joint between the radius and the carpus; and (3) the anatomical region surrounding the carpus including the distal parts of the bones of the forearm and the proximal parts of the metacarpus or five metacarpal bones and the series of joints between these bones, thus referred to as wrist joints.Behnke 2006, p 77. "With the large number of bones composing the wrist (ulna, radius, eight carpas, and five metacarpals), it makes sense that there are many, many joints that make up the structure known as the wrist."Baratz 1999, p 391. "The wrist joint is composed of not only the radiocarpal and distal radioulnar joints but also the intercarpal articulations." This region also include the carpal tunnel, the anatomical snuff box, the flexor retinaculum, and the extensor retinaculum.
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