What action does flexion refer to?

Flexion refers to the action of decreasing the angle between two body parts, typically at a joint. When a joint flexes, it brings the articulating bones closer together, which results in a sharper angle. This movement is commonly observed in various parts of the body, such as the bending of the elbow or knee. For example, when you lift your arm upwards by bending your elbow, you are performing flexion at that joint.

In contrast to flexion, increasing the angle of a joint is known as extension, which moves the joints further apart. Moving away from the midline refers to abduction, and turning the foot upward is called dorsiflexion. Understanding these definitions helps clarify the specific nature of flexion as a distinct movement pattern in anatomy.