While there are several different types of joints that differ in structure and the way they move, hinge joints are defined by their forward and backward motion, which allow them to move along one ...

It’s a ball joint. And the elbow is quite different. It just opens… and closes. It’s a hinge joint. Oh! You’ve had an idea. You could use a hinge? Well, it will move in the right way ...

Hinge joints allow flexion and extension only. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl.

A joint is any place in the body where two bones meet. Hinge joints, which include the knee, bend and straighten. Ball-and-socket joints, such as the shoulder, move in multiple ways and rotate.