Which of these joints could be described as a saddle joint?
A) the knee joint
B) the shoulder joint
C) the articular processes between vertebrae
D) the thumb joint
E) the joint between occipital condyles and the atlas

Question

Quizplus · Accepted Answer

The thumb joint is the best choice because it is the only joint that can be described as a saddle joint. A saddle joint is a type of synovial joint in which the articulating surfaces have both concave and convex areas, similar to the shape of a saddle. This allows for a wider range of motion, including movement in two planes. The joint between the metacarpal bone of the thumb and the trapezium bone of the wrist is a classic example of a saddle joint.

Which of These Joints Could Be Described as a Saddle