Electrotherapy is defined as the use of electromagnetic energy to produce what effects in the body?

• A. Thermal only
• B. Physiological and chemical effects
• C. Mechanical only
• D. No significant effect

Answer: (B)

Electrotherapy uses electrical or electromagnetic energy to elicit responses in body tissues. The effects aren’t limited to heating; while tissue heating can occur, the energy also drives physiological responses such as nerve activation and muscle contraction, and it promotes chemical changes at the cellular level due to ion movement and membrane potential shifts. So the overall impact is both physiological and chemical. The other options are too narrow or incorrect: it’s not just thermal, not solely mechanical, and there are indeed significant effects produced by electrotherapy.