Process for monitoring a treatment on the human or animal body, in which, in the area of a nerve cord, current pulses of a specified pulse width are applied in the body and in the area of a muscle that is in communication with the nerve cord, voltage signals triggered by the current pulses are measured, in a preparatory step at least one criterion of voltage signals which are still measurable in response to current pulses being determined and during the treatment, the amplitude of the current pulses being adjusted in such a way that the voltage signals received in response thereto approximately satisfy the criterion.
