The different types of movement that are permitted at each joint are described below. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes ...

Medically reviewed by Jennifer Steinhoff, MD Collarbone pain is usually caused by an injury, such as a fracture or joint ...

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.