UDK: 612.821

THE FRONTAL FUNCTIONAL ASYMMETRY CHANGES OF THE BRAIN IN PROCESS OF ATTENTIONAL BIAS TO EMOTIOUS STIMULUS

A.P. Astashchenko1, E.G. Yakimova2, E.V. Dorokhov1

1ФГБОУ ВО «Воронежский государственный медицинский университет им. Н.Н. Бурденко» Министерства здравоохранения Российской Федерации; 2Институт физиологии им. И.П. Павлова РАН, Санкт-Петербург

Abstract

Electroencephalogram (EEG) frontal asymmetry in the alpha frequency band, the theta/beta ratio (TBR ) and time of sensorimotor reactions in 25 healthy young subjects were studied in case of performing cognitive tasks. The EEG was recorded in carrying out the dot-probe test. These results showed that the mechanisms of attention to emotiogenic stimuli accompanied by frontal asymmetry with activity of the right hemisphere and high values of TBR, which indicate a possible decrease of activity between the cortex and subcortical structures. Attention and choice between competing emotional information was accompanied by increased power of bioelectrical activity in the frequency range of the α-rhythm of the EEG in all EEG leads. The dot-probe test is a significant method for identify relevant visual information that most attracts the attention of certain groups of subjects.

Keywords

frontal functional asymmetry, α-rhythm of EEG, theta/beta ratio (TBR), dot-probe test, emotional visual information.

Contacts

Астащенко Анжела Павловна – к. б. н., доцент кафедры нормальной физиологии ВГМУ им. Н.Н. Бурденко, e-mail: cercea1@rambler.ru