Question

What differentiates extension from hyperextension?

A.Extension bends joints in the opposite direction as hyperextension.
B.Extension straightens a joint, and hyperextension bends it but in the opposite direction from flexion.
C.Hyperextension straightens a joint, and extension bends it in the opposite direction from flexion.
D.Both bend joints, but extension can be damaging.

Answer 1

B. Extension straightens a joint, and hyper-extension bends it in the opposite direction from flexion

Answer 2

The right option is B. Extension straightens a joint, and hyperextension bends it but in the opposite direction from flexion. Extension is a joint movement in which there is straightening of the bones or body surfaces at a joint against resistance while hyperextension is the extension and straightening of a joint beyond its normal range of motion. Hyperextension is an extreme form of an extension and it bends a joint in the opposite direction from flexion.