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Motion of the third metacarpal, scaphoid, and lunate for a wrist dart-throw motion viewed from the finger-tips in the transverse plane with all wrist structures intact (intact) and with the scapholunate interosseous ligament, scaphotrapezium ligament, and radioscaphocapitate ligament sectioned and after 1,000 cycles of wrist motion (unstable). Flexion and radial deviation are positive.
