Which description accurately defines a monophasic current?

A monophasic current is characterized by its flow direction, specifically flowing in one direction consistently during each cycle. This type of current has a unidirectional nature, which means that the electric charge moves from the positive electrode to the negative electrode without reversing. This consistent directionality distinguishes it from other forms of electrical stimulation, such as biphasic currents, which switch the direction of flow in each cycle.

In therapeutic or clinical settings, monophasic currents are often used for purposes such as pain relief or muscle stimulation, making understanding its unique properties essential for effective treatment. The unidirectional flow can also create a specific physiologic response in tissues, influencing healing processes.

Other descriptions, such as the flow of current in both directions, pertain to biphasic currents, while the mention of multiple pulses does not apply to monophasic current and is more related to pulsed current waveforms. Similarly, the statement about ion movement is inaccurate, as monophasic currents do indeed produce ion movement due to their unidirectional flow of electric charge.