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Non-linear analysis of the EEG gamma wave in an attention and inhibition test

10.24050/reia.v20i40.1670
Published 2023-12-19
Articles

Abstract

Introduction: In recent decades, the EEG signal has been studied from a non-linear
mathematical perspective, allowing the understanding of cerebral electrical activity as
a complex dynamic system. Objective: analyze the Hurst exponents and correlations of
such exponents in the gamma wave during the resolution of an alternating attention and
interference inhibition task in university students. Methods: The sample consisted of 14
male students of physical education. The brain-interface device Emotiv Epoc® was used
to evaluate the electrical activity of the brain, the symbols and digits test was applied
to evaluate the alternating attention, and the Stroop words and colors test were used to
inhibit interference Results: Of the seven subjects who solved the alternating attention
test, one presented a greater tendency to chaos in the left hemisphere, four revealed a
greater tendency to chaos in the right hemisphere and two did not present a definite
tendency. Of the seven subjects who solved the interference inhibition test, five presented
variations in the mean H between the three Stroop plates, especially in the temporal
region. The mean of the H exponents in both tests was less than 0,5. Conclusions:
During the attention test, a greater chaos of brain electrical activity is observed, without
correlations between the regions studied. During the inhibition test, H modifications do
not present definite patterns towards order or chaos.

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References

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