Which term is used to describe excessive backward bending of a joint?

• A. Flexion
• B. Hyperextension
• C. Extension
• D. Adduction

Answer: (B)

The term that describes excessive backward bending of a joint is hyperextension. Hyperextension occurs when a joint is extended beyond its normal range of motion, leading to an angle greater than what is comfortable or typical. This condition can happen in various joints, most notably in the knee or the elbow, where the joint can bend backwards excessively.

Flexion refers to the action of bending a joint to decrease the angle between the bones, while extension is the straightening movement that increases the angle between body parts. Adduction is the movement of a limb or other part toward the midline of the body. Therefore, hyperextension specifically captures the notion of extending a joint beyond its normal limit, making it the accurate term for excessive backward bending.