A Model of Phase Synchronization of Auditory the 40 Hz Component in MEG(Biomagnetic and Medical Application)
A Model of Phase Synchronization of Auditory the 40 Hz Component in MEG(Biomagnetic and Medical Application)
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MEG 中听觉 40 Hz 分量的相位同步模型（生物磁和医学应用）
DOI：
10.3379/jmsjmag.30.311
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发表时间：
2006
影响因子：
--
通讯作者：
K. Tanaka
中科院分区：
文献类型：
--
作者：
K. Tanaka
脑磁图（MEG）被用来检测听觉40 Hz成分的刺激（优化的啁啾声），以40次/秒的速率定期重复的反应。40 Hz分量的相位在一定程度上与重复的啁啾同步，从而增加了相位相干性。为了量化同步并获得有关其机制的信息，我们使用了描述相位动力学的微分方程。结果发现，在刺激过程中获得的相干性的增加不能单独由对重复啁啾的诱发反应来解释，即使它与刺激完全同步，这表明正在进行的40 Hz分量的相位也在一定程度上与刺激同步。
Magnetoencephalography (MEG) was used to detect auditory 40 Hz components in responses to stimuli (optimized chirping sounds) regularly repeated at a rate of 40 times/s. The phase of the 40 Hz component was synchronized to a certain degree with the repeated chirps, giving rise to increased phase coherence. To quantify the synchronization and obtain information on its mechanism, we used a differential equation describing the dynamics of the phase. It was found that the obtained increase in coherence during stimuli could not be accounted for by evoked responses to the repeated chirps alone, even if it is in complete synchrony with the stimuli, indicating that the phase of the ongoing 40 Hz component was also synchronized to the stimuli to some degree.