Which of the following is NOT one of the three clinical purposes of electrotherapy?

• A. Relieve pain
• B. Activate muscle contractions
• C. Improve balance
• D. Induce physiochemical changes

Answer: (C)

The question tests the main aims of electrotherapy in clinical practice: providing analgesia, stimulating muscle contractions, and promoting tissue healing through physiochemical changes. Improving balance isn’t a direct primary purpose of electrotherapy; balance is usually addressed with proprioceptive and balance training, not as a primary electrotherapy goal.

Relieving pain is a primary use (e.g., TENS for analgesia). Activating muscle contractions is a primary use (e.g., NMES to strengthen or re-educate muscles). Inducing physiochemical changes refers to effects that support healing and tissue health, such as improving circulation or tissue repair.