APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -This pair of actions occurs about a transverse axis through a joint. The movement at a joint which decreases the angle between two adjacent body segments is know as flexion. The opposite action is extension, where the angle between body segments is increased.

Detailed explanation-2: -Extension. The opposite of flexion is extension, which refers to the straightening of a joint. In other words, flexion works to shorten a joint angle while extension works to increases it. 1 Typically, a normal extension of a joint is limited to 180 degrees or less.