Which parameter is used to describe the strength of electrical stimulation?

The strength of electrical stimulation is described by amplitude, which refers to the magnitude of the electrical signal being delivered. In the context of electrical stimulation therapy, amplitude determines how intense the stimulation feels to the patient. Higher amplitude settings produce stronger contractions in the targeted muscles, which can be critical for effective rehabilitation purposes.

While pulse duration relates to the length of time each pulse lasts and ramp-time refers to how quickly the stimulation intensity increases or decreases, and frequency deals with how often the pulses are delivered, none of these factors describe the 'strength' in the same way that amplitude does. Amplitude is fundamentally linked to the effectiveness of stimulation in terms of muscle contraction and sensory response, making it the primary parameter to understand when discussing the strength of electrical signals in therapeutic settings.