To increase flexion of the carpometacarpal (CMC)joint of the thumb:
A) Glide the base of the first metacarpal in an ulnar direction on the trapezium.
B) Glide the base of the first metacarpal dorsally on the trapezium.
C) Glide the base of the first metacarpal radially on the trapezium.
D) Glide the base of the first metacarpal in a volar direction on the trapezium.

Question

Quizplus · Accepted Answer

To increase flexion of the CMC joint of the thumb, glide the base of the first metacarpal in an ulnar direction on the trapezium. This movement is commonly referred to as "opposition" and is necessary for grasping and pinching activities.

To Increase Flexion of the Carpometacarpal (CMC)joint of the Thumb