人类听觉皮层中稳态40赫兹反应与自发10赫兹活动的独立性。

Independence of steady-state 40-Hz response and spontaneous 10-Hz activity in the human auditory cortex.

作者信息

Tesche C, Hari R

机构信息

Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland.

出版信息

Brain Res. 1993 Nov 26;629(1):19-22. doi: 10.1016/0006-8993(93)90475-3.

DOI:10.1016/0006-8993(93)90475-3

PMID:8287276

Abstract

We recorded neuromagnetic signals from 5 subjects with a 24-channel planar SQUID gradiometer. Our aim was to search for any relationship between the 40-Hz steady-state responses and the spontaneous 10-Hz activity in the auditory cortex. Source strengths and locations of spontaneous activity were determined from spectral components of the data, and sources within the auditory cortex were determined by restricting the source location to a neighborhood of the auditory evoked response to single clicks. The characteristics of the 40-Hz steady-state responses were not simply related to those of the spontaneous 10-Hz activity, even within subjects, suggesting that these two oscillatory phenomena have independent generators.

摘要

我们使用一台24通道平面超导量子干涉仪梯度计记录了5名受试者的神经磁信号。我们的目的是寻找听觉皮层中40赫兹稳态反应与自发10赫兹活动之间的任何关系。根据数据的频谱成分确定自发活动的源强度和位置，并通过将源位置限制在对单次点击的听觉诱发反应的邻域内来确定听觉皮层内的源。即使在受试者内部，40赫兹稳态反应的特征也与自发10赫兹活动的特征没有简单的关联，这表明这两种振荡现象具有独立的发生器。