What are the primary physiological effects of cryotherapy on soft tissue?

What are the primary physiological effects of cryotherapy on soft tissue?

• A. Increases tissue temperature, increases nerve conduction velocity, increases metabolic rate, and increases edema.
• B. Decreases tissue temperature, increases nerve conduction velocity, increases metabolic rate, and increases edema.
• C. Lowers tissue temperature, reduces nerve conduction velocity, decreases metabolic rate, and reduces edema.
• D. Lowers tissue temperature, increases nerve conduction velocity, decreases metabolic rate, and reduces edema.

Answer: (C)

Cryotherapy works by lowering the tissue temperature. When tissue is cooled, the rate of enzymatic and cellular processes slows, so metabolic rate decreases. This reduced metabolic activity lowers the tissue’s demand for oxygen and nutrients and dampens the inflammatory response that follows injury. Cooling also slows nerve conduction velocity, especially in sensory fibers, which helps reduce pain signals. In addition, cold causes vasoconstriction, decreasing blood flow and capillary permeability, which limits fluid leakage into the tissues and thereby reduces edema. Altogether, these effects align with a scenario where tissue temperature falls, nerve conduction slows, metabolic rate decreases, and edema is reduced. The other options describe warming or increased neural activity and metabolism, which do not occur with cryotherapy.

Cryotherapy works by lowering the tissue temperature. When tissue is cooled, the rate of enzymatic and cellular processes slows, so metabolic rate decreases. This reduced metabolic activity lowers the tissue’s demand for oxygen and nutrients and dampens the inflammatory response that follows injury. Cooling also slows nerve conduction velocity, especially in sensory fibers, which helps reduce pain signals. In addition, cold causes vasoconstriction, decreasing blood flow and capillary permeability, which limits fluid leakage into the tissues and thereby reduces edema. Altogether, these effects align with a scenario where tissue temperature falls, nerve conduction slows, metabolic rate decreases, and edema is reduced. The other options describe warming or increased neural activity and metabolism, which do not occur with cryotherapy.