Which current is known as the current used for muscle stimulation and is a type of alternating current?

• A. Direct current
• B. Faradic current
• C. Microcurrent
• D. High Frequency

Answer: (B)

Muscle stimulation relies on delivering bursts of current strong enough to depolarize nerves and cause a contraction. Faradic current does exactly that with brief, high-intensity bursts produced by an induction coil, and these bursts alternate in direction as they’re delivered in pulses. That pulsed, reversing flow is what makes it a form of alternating current, suitable for eliciting muscle contractions in cosmetic and therapeutic settings. In contrast, direct current flows in one direction steadily and isn’t used for controlled muscle contractions; microcurrent uses much smaller amplitudes mainly for healing rather than strong contractions; high frequency currents are chosen for heating or sterilization rather than muscle stimulation.