What is flexion?

Flexion refers to a movement that decreases the angle between two body parts at a joint. This typically involves bending a limb or a joint, such as when you bend your elbow to bring your forearm toward your shoulder. In essence, flexion allows for movements such as raising your arm or bending your knee. It is a fundamental movement in various physical activities and is essential for many daily tasks.

The other options present movements that do not align with the definition of flexion. For example, straightening a limb or increasing the angle at a joint describes extension, while rotational movements occur in different contexts, relating to how limbs move in a circular manner around a joint. Hyperflexion involves excessive bending beyond the normal range of motion, which is distinct from the basic definition of flexion. Understanding these distinctions is key to grasping human body mechanics and movement.