In abduction of the first carpometacarpal (CMC)joint,the first metacarpal would roll in a ________________direction and glide in a ________________direction on the trapezium.
A) volar,dorsal
B) radial,ulnar
C) volar,volar
D) radial,radial

Question

Quizplus · Accepted Answer

In abduction of the first carpometacarpal (CMC) joint, the first metacarpal rolls in a volar direction and glides in a dorsal direction on the trapezium. This is due to the unique saddle shape of the CMC joint, which allows for this specific movement pattern.

In Abduction of the First Carpometacarpal (CMC)joint,the First Metacarpal Would