Synchronous cortical gamma‐band activity in task‐relevant cognition
作者:
Albert Haig,
Evian Gordon,
James Wright,
Russell Meares,
Homayoun Bahramali,
期刊:
NeuroReport
(OVID Available online 2000)
卷期:
Volume 11,
issue 4
页码: 669-675
ISSN:0959-4965
年代: 2000
出版商: OVID
关键词: Binding;Cognition;EEG;ERP;Gamma;Phase;Synchronicity
数据来源: OVID
摘要:
Widespread synchronous oscillatory activity, particularly in the gamma (‘40 Hz’) band, has been postulated to exist in the brain as a mechanism underlying binding. A new method of examining phase synchronicity across multiple electrode sites in specific EEG frequency bands as a function of time was employed, in a conventional cognitive ERP paradigm in 40 normal subjects. A significant late post-stimulus gamma synchronicity response occurred for task-relevant stimuli, whereas for task-irrelevant stimuli no such response was evident. However, an early response was seen for both task-relevant and irrelevant stimuli. This is the first empirical demonstration that widespread synchronous high frequency oscillations occur in humans in relation to cognition.
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