What type of current waveform is generally used in electrical stimulation?

The correct answer is biphasic waveform. This type of waveform is commonly used in electrical stimulation due to its balanced delivery of electrical current. Biphasic waveforms feature alternating phases, which can help in reducing skin impedance and providing a more effective stimulation to the muscles or nerves.

Biphasic waveforms can be both symmetrical and asymmetrical, which allows for versatility in various therapeutic applications. Their dual-phase nature allows for equal positive and negative charges, making it less likely to build excessive charge at the electrodes, thus minimizing potential discomfort and tissue irritation during treatment.

While triphasic and quadriphasic waveforms may exist, they are not standard in typical clinical practice for electrical stimulation. Monophasic waveforms, while useful in specific scenarios, primarily deliver a single phase of current, which can lead to a buildup of charge and potentially cause skin irritation in prolonged use. Consequently, the biphasic waveform is generally preferred for its effectiveness and safety in various therapeutic contexts.