Somatosensory evoked potentials upon electrical stimulation triggered by voluntary movement.
The autotriggered signal was presented with a varying delay. SEP obtained without movement of the thumb (control series), SEP of autotriggered stimuli and movement-related brain potentials (MRBP) without stimuli were registered. The EEG was recorded from C3 + 2 and C3 = 2. The following results were obtained: the amplitude of all components diminished when the stimulation was autotriggered compared to the control series; the suppression was most pronounced with a stimulus delay about 150-200 ms; the effect of the suppression did not disappear up to 500 ms after the beginning of the movement.
D001921:Brain / Q000502:physiology; D004558:Electric Stimulation; D004569:Electroencephalography; D004594:Electrophysiology; D005073:Evoked Potentials, Somatosensory; D006801:Humans; D009068:Movement