Assessing transient cross-frequency coupling in EEG data
Assessing transient cross-frequency coupling in EEG data
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DOI：
10.1016/j.jneumeth.2007.10.012
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发表时间：
2008-03-15
影响因子：
3
通讯作者：
Cohen, Michael X.
中科院分区：
文献类型：
--
作者：
Cohen, Michael X.
不同频段的振荡性脑电图信号的同步在认知神经科学和神经生理学中受到越来越多的关注，并且跨频耦合正日益与认知和感知过程相关联。存在几种用于检测跨频耦合的方法，尽管每种方法都有其局限性，通常要么仅在时间上灵活，要么仅在频率上灵活。在此，提出了一种用于评估瞬时跨频耦合的方法，该方法能够检测在时间和频率上存在的多种、动态且灵活的跨频耦合结构。将该方法应用于颅内脑电图数据，观察到伽马波（约40 - 80赫兹）和上θ波（约7 - 9赫兹）之间存在强耦合。这种方法可能在揭示认知过程的电生理相关性方面具有有用的应用。© 2007爱思唯尔有限公司。保留所有权利。
Synchronization of oscillatory EEG signals across different frequency bands is receiving waxing interest in cognitive neuroscience and neurophysiology, and cross-frequency coupling is being increasingly linked to cognitive and perceptual processes. Several methods exist to examine cross-frequency coupling, although each has its limitations, typically by being flexible only over time or over frequency. Here, a method for assessing transient cross-frequency coupling is presented, which allows one to test for the presence of multiple, dynamic, and flexible cross-frequency coupling structure over both time and frequency. The method is applied to intracranial EEG data, and strong coupling between gamma (similar to 40-80 Hz) and upper theta (similar to 7-9 Hz) was observed. This method might have useful applications in uncovering the electrophysiological correlates of cognitive processes. Q 2007 Elsevier B.V. All rights reserved.