事件相关振荡与振荡脑网络

Event-related Oscillations within Oscillatory Brain Network

事件相关振荡是伴随认知、情感和行为过程的脑电磁振荡活动,观察到其各类调频、调幅和调相现象,这种介观和宏观尺度上大量神经元的集体活动与微观尺度上神经元平均发放率和发放定时相互影响,共同参与神经信息的编码、表征、通讯和调控。动态细胞集群假说认为大脑认知功能是神经网络通过同步振荡相互作用的结果,在基于振荡的大脑理论指引下,多尺度、跨脑区和跨频率事件相关振荡研究为揭开振荡脑网络的工作原理带来了希望。

Both methodology and experimental researches of event-related oscillations （ERO） are reviewed. Phenomena of frequency, amplitude and phase modulations at the meso- and macroscale were observed from ERO. ERO affects both average firing rate and timing pattern of neurons （microscale）. As well as neuronal spike, ERO may involve in various aspects of neural information processing including coding, representation, communication and control. Combined with brain theory of dynamical cell assembly that hypotheses cognitive fimctions result from synchronization and/or desynchronization of oscillatory neural ensembles, investigations on ERO of cross-frequency, cross-region and cross-scale may further disclose the working principles of brain.