Flexion primarily occurs at which types of joints?

Flexion primarily occurs at hinge joints because these joints are specifically designed to allow movement in one plane, much like the action of a door opening and closing. Hinge joints, found in areas such as the elbows and knees, enable bending and straightening motions, which are the key characteristics of flexion and extension.

In contrast, while ball and socket joints allow for a wide range of movement, including flexion, they are not solely defined by this action. Gliding joints allow for limited movement in multiple directions but don’t facilitate the distinct bending motion associated with flexion. Pivot joints permit rotational movement around a single axis, which is different from the bending movement associated with flexion. Thus, hinge joints are the primary joints where flexion occurs.