Emulation of electrophysiological signals derived by stimulation of a body

An emulation apparatus arranged to emulate an electrophysiological signal derived from a target area of the nervous system of a human or animal body under the influence of a stimulation signal applied to the human or animal body, the emulation apparatus comprising:

• a prior signal generator arranged to generate a prior signal representing the electrophysiological signal derived from the target area of the nervous system of the human or animal body in the absence of the stimulation signal;
• a test signal input arranged to receive a test signal representing the stimulation signal applied to the human or animal body;
• a modelling unit arranged to derive a modulation signal, which modulation signal represents a degree of modulation of the electrophysiological signal by the stimulation signal, from the test signal in accordance with a model implemented within the modelling unit of a temporal evolution of the modulation of the electrophysiological signal caused by the stimulation signal;
• and
• a modulation unit arranged to modulate the prior signal in accordance with the modulation signal to output an emulation signal representing an electrophysiological signal derived under the influence of the stimulation signal.