Synchronization/desynchronization of cortical electrical activity in the theta and alpha ranges evoked by facial images during increased loading on working memory

被引：0

作者：

E. A. Kostandov

E. A. Cheremushkin

机构：

[1] Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow

来源：

Neuroscience and Behavioral Physiology | 2012年 / 42卷 / 5期

关键词：

Cognitive set; Corticohippocampal and frontothalamic integration systems; Evoked synchronization/desynchronization; Phasic and tonic forms of cortical activation; Recognition of facial expressions; Theta and alpha potentials; Working memory;

D O I：

10.1007/s11055-012-9591-1

中图分类号：

学科分类号：

摘要：

A cognitive set model to emotional facial expressions was used in healthy adult humans to study evoked synchronization/desynchronization reactions of cortical theta and alpha activity to images of faces during increased loading on working memory (with an additional task consisting of recognizing verbal stimuli). A correlation was seen between behavioral (increased set inertia) and electrophysiological (decreased evoked theta-rhythm synchronization) experimental data. We propose the hypothesis that increases in tonic prestimulus activity of theta potentials during the prestimulus period and suppression of phasic corticohippocampal system activation reactions are among the neural mechanisms decreasing the plasticity of the cognitive function of recognizing emotional facial expressions in humans in conditions of increased loading on working memory. The question of the reciprocal relationships between the two functional systems integrating brain activity - the corticohippocampal and the frontothalamic - in the process of recognizing emotional facial expressions is discussed. © 2012 Springer Science+Business Media, Inc.

引用

页码：495 / 504

页数：9

共 25 条

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