TITLE

Changes in the Beta Rhythm on Acquisition of a Set to an Emotional Facial Expression with Lengthening of the Time Interval Between the Warning and Trigger Stimuli

AUTHOR(S)
Yakovenko, I.; Cheremushkin, E.; Kozlov, M.
PUB. DATE
November 2014
SOURCE
Neuroscience & Behavioral Physiology;Nov2014, Vol. 44 Issue 9, p1031
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Studies on 35 healthy subjects using wavelet transformation addressed changes in the parameters of the beta rhythm on acquisition of a set to a facial expression in conditions of loading on working memory in the form of an increase in the interval between the warning and trigger stimuli to 8 sec. Beta-rhythm power was analyzed in terms of the mean level and the peak coefficient of wavelet transformation. Numbers of recognition errors were used to divide the subjects into three groups: from 1 to 5 and from 5 to 30 errors, and a group of subjects with error-free recognition of facial expression. The group with error-free recognition was characterized by high values for the mean coefficient of the beta-rhythm wavelet transformation throughout the experiment, high peak values for the coefficient of beta-rhythm wavelet transformation during the first one-second interstimulus interval, the longest peak latent periods at the formation stage, and a predominance of peaks in the coefficient of the beta-rhythm wavelet transformation in the left hemisphere as compared with the right. Subjects with erroneous recognition had a lower mean coefficient of wavelet transformation, lower wavelet transformation coefficient, and lower latent periods at the set formation stage. In terms of peaks of the wavelet transformation coefficient, subjects of these two groups were dominated by the right hemisphere.
ACCESSION #
98742306

 

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