Bioelectrical brain activity in students during cognitive activity under time limitation
Abstract
Background. Time-constrained cognitive activity is regarded as activity under stress. Students in the educational process often face the need of solving learning tasks in a short time. The study of bioelectrical brain activity according to the parameters of spectral power of the main EEG rhythms in students and success of cognitive activity in conditions of time pressure will contribute to the understanding of neurophysiological mechanisms of performing such activity, will allow to reveal EEG correlates of search reading with time constraint.
Purpose. Studying of the bioelectrical activity of students' brain during cognitive activity with time limitation.
Materials and methods. 30 students of Northern (Arctic) federal university named after M.V. Lomonosov (average age 19 y.o.) were examined. The bioelectrical activity of the students' brain was investigated in the state of quiet wakefulness with open eyes, during cognitive activity without and with time limitation with fixation of success rate of cognitive tasks performance. The bioelectrical activity of the students' brain was analyzed by the parameters of the average spectral power of the main EEG rhythms using the Brainstorm program.
Results. During search reading regardless of the conditions function-specific changes in the spectral power of the main EEG rhythms are observed, which intensify during time-limited activity. Such changes in brain activity accompany an increase in the speed of cognitive task performance (within 10-20%) and a 2.5 rise in the number of errors.
Conclusion. The observed changes in bioelectrical brain activity mark more intense cognitive activity in conditions of time pressure and emotional component in response to stress.
EDN: EGAJXT
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References
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