Abstract
Relationship between evoked potential and stimulusintensity under various consciousness wasstudied by an analog-type ARC.
In a certain depth of sleep, evoked potentialincreased as a function of stimulus intensity up to40-50dB, but it was remarkably influenced bysubject's consciousness. Average response to tonepips was most clearly observed in the drowsy andhump stage.
The facts suggest that for the evaluation ofauditory threshold by EEG response it is importantto monitor the subject's consciousness during examination.
Finally the results were discussed from aneurophysiological point of view.
