SPECTRA OF AUDITORY BRAIN-STEM RESPONSES AND SPONTANEOUS EEG
SPECTRA OF AUDITORY BRAIN-STEM RESPONSES AND SPONTANEOUS EEG
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DOI：
10.1109/tbme.1981.324801
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发表时间：
1981-01-01
影响因子：
4.6
通讯作者：
BOSTON, JR
中科院分区：
文献类型：
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作者：
BOSTON, JR
人类听觉脑干反应（ABR）是感觉诱发电位，可以在瞬态声刺激后几毫秒内记录下来。本文描述了一项模拟研究的结果，该研究评估了用于估计 ABR 信号和背景 EEG 频谱的替代技术。考虑了平均信号中残余噪声的影响、平均值中的响应数量以及平滑窗口的使用。还获得了人类 ABR 的光谱。频谱能量随频率降低至 2 kHz，并在 2 kHz 以上趋于平坦。 ABR 信号频谱限制在约 1.5 kHz 以下。主要成分有3个：100Hz左右的低频成分、500Hz左右的中频成分、1000Hz左右的高频成分。窄带滤波表明中频分量主要与 Jewett 波 V 相关，而高频分量主要与早期 Jewett 波相关。这两个组件对于确定波的延迟可能是最重要的。低频分量似乎对应于叠加了朱厄特波的慢波。
Human auditory brainstem responses (ABR's) are sensory evoked potentials that can be recorded within a few milliseconds following a transient acoustic stimulus. This paper describes results of a simulation study that evaluated alternative techniques for estimating the spectrum of the ABR signal and of the background EEG. The effects of residual noise in the average signal, the number of responses in the average, and the use of smoothing windows were considered. Spectra of human ABR's were also obtained. The spectral energy decreases with frequency to 2 kHz and seems to flatten above 2 kHz. The ABR signal spectrum is limited to below approximately 1.5 kHz. There are three main components: a low-frequency component around 100 Hz, a midfrequency component around 500 Hz, and a high-frequency component at 1000 Hz. Narrow-band filtering suggests that the midfrequency component is primarily associated with Jewett wave V, while the high-frequency component is primarily associated with the early Jewett waves. These two components are probably the most important for determining the latencies of waves. The low-frequency component appears to correspond to a slow wave on which the Jewett waves are superimposed.