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. select the best answer from the choices provided. a b c d

B. Extension straightens a joint, and hyperextension bends it but in the opposite direction from flexion.

Explanation:

Extension and hyperextension are terms used to refer to types of body movements. Since extension is a movement in the sagittal plane, in which two body segments (proximal and distal) move away from each other; whereas hyperextension is occurs when the extension movement exceeds the anatomical position or beyond its normal capacity. In addition, extension straightens a joint and hyperextension the curve, but in the opposite direction to flexion.

B

Explanation: B. Extension straightens a joint, and hyperextension bends it but in the opposite direction from flexion.