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Upper Limb

Kinematics of the wrist

EVIDENCE FOR TWO TYPES OF MOVEMENT



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Abstract

We enrolled 34 normal volunteers to test the hypothesis that there were two types of movement of the wrist. On lateral radiographs two distinct patterns of movement emerged. Some volunteers showed extensive rotation of the lunate with a mean range of dorsiflexion of 65°, while others had a mean range of 50°. The extensive rotators were associated with a greater excursion of the centre of articulation of the wrist. It is suggested that dynamic external fixation of a fracture of the distal radius carries with it the risk of stretching the ligaments or causing volar displacement at the site of the fracture.


Correspondence should be sent to Mr B. D. Ferris at 119 Green Lane, Edgware, Middlesex HA8 8EL, UK.

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