Assertion: wrist | /r/HasProperty | trapezium
Facets:
Source sentences:
text: The thumb basal joint, also called the carpometacarpal (CMC) joint, is a specialized saddle-shaped joint that is formed by a small bone of the wrist (trapezium) and the first bone of the thumb (metacarpal).The saddle shaped joint allows the thumb its wide range of motions, including up, down, across the palm, and the ability to pinch (see Figure 1).