ANATOMY

Detailed explanation-1: -The prime example of a saddle joint is the trapeziometacarpal joint at the base of your thumb. It connects the trapezium and the metacarpal bone of your thumb.

Detailed explanation-2: -Examples of saddle joints in the human body include the carpometacarpal joint of the thumb, the sternoclavicular joint of the thorax, the incudomalleolar joint of the middle ear, and the calcaneocuboid joint of the heel.

Detailed explanation-3: -Base of the thumb: The joint at the base of your thumb is a saddle joint. This joint, called the first carpometacarpal joint, is located between the trapezium and the first metacarpal bone at the base of your thumb.

Detailed explanation-4: -Answer and Explanation: No, the thumb is not the only saddle joint in the body. Although the thumb is one of the best examples of a saddle joint because we can easily observe the movement of the joint, there are two other saddle joints.

Detailed explanation-5: -Thumb. The thumb digit has only two phalanges (bones) so it only has one joint. The thumb interphalangeal (IP) joint is similar to the distal interphalangeal (DIP) joint in the fingers. The IP joint in thumb is located at the tip of the finger just before the fingernail starts.