The duration of the faradic impulse is approximately which?

• A. 0.001 of a second
• B. 1 megasecond
• C. 0.01 of a second
• D. Variable

Answer: (A)

Faradic impulses are very brief bursts of current used to rapidly stimulate nerves or muscles. The duration is on the order of a fraction of a second, specifically about one millisecond (0.001 seconds). This short pulse is enough to depolarize nerves effectively while minimizing tissue heating and prolonged contraction. Longer pulses, like 0.01 seconds, would produce a slower, more sustained response and more heating, which isn’t typical for the intended faradic stimulation. The impulse duration isn’t variable in standard practice, and a megasecond would be far too long to function as a distinct stimulation pulse. So the best match is the brief, about-one-millisecond duration.