大脑中的一组特殊细胞(称为神经元)通过电脉冲相互通信。这些冲动产生的节奏就是脑电波。我们可以通过脑电图测试(EEG)检测脑电波。 什么是脑电波状态? 脑电波状态是指示大脑不同活动水平的脑电波模式。脑电波不断运动;大脑在所有频率上都会产生一致的电波。脑电波状态有五种:Gamma、Beta、Alpha、Theta 和 Delta。
做脑电研究的朋友对于脑电EEG的频段应该都很熟悉了,一般来说,EEG的频段主要分为五个,即delta、theta、alpha、beta和gamma,不同频段,其意义、功能、产生机制等各方面也会不同。本文,笔者对theta频段振荡进行简单的阐述,不求对theta振荡做广而宽的全面介绍,而是主要对笔者看到的关于theta振荡的内容做了简单的梳理,希...
Delta/Theta band EEG activity shapes the rhythmic perceptual sampling of auditory scenesMany studies speak in favor of a rhythmic mode of listening, by which the encoding of acoustic information is structured by rhythmic neural processes at the time scale of about 1 to 4 Hz. Indeed, ...
Hippocampal LFP was resampled at 1 kHz and filtered in the theta and delta bands (Supplementary Fig. 3a, e and i). Frequency band boundaries were defined based on the Fourier spectra of the raw LFP (delta, 0.5–4 Hz, theta, 4–12 Hz), similarly to ref. 52. The filtered the...
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delta ranges, highlighting statistically significant differences observed before and after specific conditions. With eyes-closed (after vs. before): Waiting 5 min before performing EEG recordings and closing the eyes led to a partial normalization of brain activity, potentially reducing the visibility of...
Assessing the EEG oscillatory activity by means of intracerebral recordings in a single epileptic patient at SO, we found that the calcarine cortex was dominated by theta oscillations, while parietal and frontal areas exhibited mainly delta, sigma, and beta oscillatory activity (Marzano et al., ...
The EEG theta band displays distinct roles in resting and task states. Low resting theta and transient increases in frontal-midline (fm) theta power during
Are cognitive processes manifested in event-related gamma, alpha, theta and delta oscillations in the EEG? Author links open overlay panelErol Başar a b, Canan Başar-Eroğlu c, Sirel Karakaş b d, Martin Schürmann aShow more Add to Mendeley Share Cite...
delta ranges, highlighting statistically significant differences observed before and after specific conditions. With eyes-closed (after vs. before): Waiting 5 min before performing EEG recordings and closing the eyes led to a partial normalization of brain activity, potentially reducing the visibility of...