Effects of active movement and mental movement simulation on somatosensory evoked potentials: a current density reconstruction approach

Both, movement of the stimulated hand, as well as its mental simulation, lead to an attenuation of the median nerve somatosensory evoked potentials (SEPs), an effect commonly termed as „gating“. We have analysed multi-channel EEG-data to investigate the influence of active movement and mentally simulated movement on median nerve SEP-components using the method of current density reconstruction. This approach provides increased spatial resolution capacity in case of restricted „a priori“ knowledge concerning the underlying cortical generators, compared to conventional methods of EEG-data analysis such as dipole s…