摘要
目的 :探讨主动与被动模式下听觉事件相关电位 P30 0的反应特性及其临床应用的意义。方法 :选择正常青年人为测试对象 ,以让受试者对靶刺激进行计数 (主动模式 )和不计数 (被动模式 ) 2种方式记录 P30 0 ,分析在2种模式下各波潜伏期、幅值、波形和稳定性的特性。结果 :主动和被动模式可记录到相似的 P30 0 ,但主动模式各波的潜伏期短于被动模式 ,N1- P2的幅值略小于被动模式 ,而 N2 - P3的幅值则显著大于被动模式。结论 :主动和被动模式潜伏期和幅值的差异表明 P30 0的反应与听觉中枢的认知过程有关。 P30
Objective:To study the responsibilities and the clinical applications of auditory eventrelated response P300 recorded with active and passive modes in normal young adults.Method: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.Result: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 N1P2 in active mode was lower than the one in passive mode, nevertheless, the amplitude of N2P3 in active mode was significantly higher than the one in passive mode.Conclusion: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.
出处
《临床耳鼻咽喉科杂志》
CSCD
2000年第7期296-298,共3页
Journal of Clinical Otorhinolaryngology
关键词
测听法
听觉诱发电位
声刺激
Audiometry Auditory evoked potential Acoustic stimulus
