Extension

Definition

Extension is a type of body movement in anatomy and physiology that increases the angle between two parts at a joint, typically straightening from a flexed position. It is the opposite of flexion and is common in joints such as the elbow or knee.

Related terms

Flexion:

A type of body movement that decreases the angle between two parts, typically bending them closer together.

Hyperextension: An extreme or excessive extension of a limb or body part beyond its normal limit, often leading to injury.

Joint: A structure in the human or animal body where two parts of the skeleton are fitted together, allowing for movement or stability