Machinskiĭ N O, Machinskaia R I, Trush V D
Zh Vyssh Nerv Deiat Im I P Pavlova. 1987 Jul-Aug;37(4):674-80.
Degree of manifestation and synchronization of rhythmic alpha-range components in various cortical areas was studied in healthy adult subjects in conditions of controlled computer experiment by spectral-correlation method of EEG analysis during directed attention previous to discrimination of tactile, auditory and visual stimuli. The obtained results show that in preparation for discrimination of heteromodal stimuli, specific reconstructions take place of alpha-range electrical activity determined by signal modality. These changes are expressed in a local increase of the degree of synchronization of alpha oscillations in those projection and associative brain areas which are connected with the analysis of the given stimuli. Functional significance of these reconstructions is seen in the fact that they are significantly more expressed at correct recognition. A hypothesis is suggested about participation of the alpha-range in neurophysiological mechanisms of directed attention.
在一项受控计算机实验条件下，通过脑电图分析的频谱相关方法，研究了健康成年受试者在辨别触觉、听觉和视觉刺激之前的定向注意过程中，不同皮质区域节律性α频段成分的表现程度和同步性。所得结果表明，在准备辨别异模态刺激时，由信号模态决定的α频段电活动会发生特定重构。这些变化表现为与给定刺激分析相关的那些投射和联合脑区中α振荡同步程度的局部增加。这些重构的功能意义在于，它们在正确识别时表现得更为明显。由此提出了一个关于α频段参与定向注意神经生理机制的假说。
