Question

multiple choice question
the joint at the base of the thumb is a ______ joint.
condylar
hinge
saddle
ball - and - socket

Explanation:

The base - of - thumb joint is a saddle joint. It allows for a wide range of movement including opposition, which is unique to the thumb. Condylar joints are found in places like the jaw, hinge joints like in the elbow allow only back - and - forth movement, and ball - and - socket joints are in the shoulder and hip.

Answer:

C. saddle