Kostandov E A, Cheremushkin E A, Ashkinazi M L
Fiziol Cheloveka. 2011 Mar-Apr;37(2):5-13.
Changes in face expression recognition and EEG synchronization arising from additional load on working memory were studied in healthy adults. Two types of additional task--semantic and visuospatial--were used to load working memory in an experiment with a visual set, formed to facial stimuli. During perception of new facial stimuli, both these types of additional task caused an increase of erroneous face expression recognitions in the form of assimilative illusions. Alpha-band (8-10 Hz) EEG synchronization analysis revealed that additional memory load causes a decrease of frontal attention system input in set-forming and set-shifting. As for theta-band (4-7 Hz) synchronization, it changed ambiguously at additional memory load--in right fronto-temporal region coherence function decreased; other coherence connections, especially intra-hemispheric and in the left hemisphere, increased. At issue is the crucial role of fronto-thalamic and cortico-hippocampal systems in plasticity of visual sets formed to facial expressions.
在健康成年人中研究了工作记忆额外负荷引起的面部表情识别变化和脑电图同步情况。在一个以面部刺激形成视觉集的实验中，使用了两种额外任务——语义任务和视觉空间任务——来负荷工作记忆。在感知新的面部刺激时，这两种额外任务都会以同化错觉的形式导致错误面部表情识别增加。α波段（8 - 10赫兹）脑电图同步分析表明，额外的记忆负荷会导致在集形成和集转换过程中额叶注意力系统输入减少。至于θ波段（4 - 7赫兹）同步，在额外记忆负荷下其变化不明确——右额颞区相干函数下降；其他相干连接，尤其是半球内和左半球的相干连接增加。额叶 - 丘脑系统和皮质 - 海马系统在由面部表情形成的视觉集可塑性中起着关键作用。
