[Comparisons of auditory event-related potential P300 recorded with active and passive modes].
OBJECTIVE
To study the responsibilities and the clinical applications of auditory event-related response P300 recorded with active and passive modes in normal young adults.


METHODS
P300s were recorded with active and passive modes, that is, to count and not to count the numbers of target stimuli during measuring respectively, in young adults as subjects. The waveforms, latencies and amplitudes of P300 were analyzed.


RESULTS
The resemble P300 in waveform and responsibility could be recorded with active and passive mode. There were some differential responsibilities between active and passive recording modes, which the latencies in active mode were shorter than the ones in passive mode, the amplitude of N1-P2 in active mode was lower than the one in passive mode, nevertheless, the amplitude of N2-P3 in active mode was significantly higher than the one in passive mode.


CONCLUSIONS
The resemble P300 in waveform and responsibility could be recorded with active and passive mode. The differences of latencies and amplitudes between two modes demonstrated that the responsibility of P300 was related to the recognition process of auditory center. On the other hand, the passive recording mode of P300 is a way to measure for the uncooperative subjects.
Liang
Y
Y
Department of Otorhinolaryngology, Eye & ENT Hospital, Shanghai Medical University, Shanghai 200031.
Wang
Z M
ZM
D000161:Acoustic Stimulation / Q000379:methods*; D000293:Adolescent; D000328:Adult; D001303:Auditory Cortex / Q000502:physiology; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male