In anatomy, Flexion is movement whereby bones or other parts of the body, including the trunk, are brought closer together. For example, flexion of the arm involves the forearm being brought closer to the upper arm. Note that flexion occurs only along the sagittal plane, i.e. from the forward to backward direction, and not side-to-side direction, which would be called abduction. Flexion thereby decreases the angle between the bones of the limb at a joint.

Flexión (anatomía)