HUMAN AUDITORY EVOKED-POTENTIALS TO FREQUENCY-MODULATED TONES
HUMAN AUDITORY EVOKED-POTENTIALS TO FREQUENCY-MODULATED TONES
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DOI：
10.1097/00003446-198906000-00003
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发表时间：
1989-06-01
期刊：
影响因子：
3.7
通讯作者：
PICTON, T
中科院分区：
文献类型：
--
作者：
MAISTE, A;PICTON, T
三个实验评估了稳态和瞬时听觉诱发电位(EP)对频率正弦调制的音调和在两个频率之间以线性斜坡交替的音调的反应。正弦调频的稳态响应很小，很难在一次和二次谐波下记录到。斜波调频比正弦调频产生更大和更一致的二次谐波稳态响应。只有斜坡调频刺激才能诱发瞬时EPs，而且这些EPs只能在低调制速率下产生。这些响应对向上的斜坡比对向下的斜坡更大。对两个同时呈现的斜波调频音调的反应不同于对单个音调的反应总和，这表明在两个刺激的加工过程中存在一定的交互作用。
Three experiments evaluated steady state and transient auditory evoked potentials (EPs) to tones that were sinusoidally modulated in frequency and to tones that alternated between two frequencies with a linear ramp. The steady state responses to sinusoidal FM were small and difficult to record at both the first and second harmonics. Ramp FM evoked larger and more consistent second harmonic steady state responses than the sinusoidal FM. Only the ramp FM stimuli elicited transient EPs and these only at low modulation rates. These responses were larger to upward ramps than to downward ramps. The response to two simultaneously presented ramp Fm tones differed from the sum of responses to the individual tones, indicating some interaction in the processing of the two stimuli.