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

Authors

Keywords:

electroencephalogram, gamma waves, attention, inhibition.

Abstract

Introduction: During the last decades the electroencephalogram signal has been studied from a nonlinear mathematical perspective. This allows understanding brain electrical activity as a complex dynamical system.

Objective: To evaluate Hurst exponents and their correlations in the gamma wave during an alternating attention and interference inhibition task in university students.

Methods: The sample consisted of 14 physical education students. The Emotiv Epoc® brain-interface device was used to evaluate brain electrical activity. Alternating attention was estimated with the symbols and digits test, while the Stroop words and colors test was used for interference inhibition.

Results: In the alternating attention test, four individuals revealed a greater propensity to chaos in the right hemisphere, one showed a greater tendency in the left hemisphere and two had no defined predisposition. On the other hand, during interference inhibition, variations of Hurst average values between the three Stroop effect slices were determined in five subjects, especially in the temporal region. Hurst exponents in both tests were found to be less than 0.5.

Conclusions: During the attention test, a greater chaos of brain electrical activity is observed, with no correlations between the regions studied. During the inhibition test, the modifications of the Hurst exponents do not present defined patterns towards order or chaos.

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Author Biographies

Fernando Maureira Cid, Universidad Metropolitana de Ciencias de la Educación

Departamento de Educación Física, Deportes y Recreación.

Hernán Díaz Muñoz, Universidad de Santiago

Departamento de Matemáticas y Ciencias de la Computación.

Marcelo Hadweh Briceño, Universidad SEK

Programa de Doctorado en Educación

Patricia Bravo Rojas, Universidad Católica Silva Henríquez

Escuela de Educación en Ciencias del Movimiento y Deportes.

Elizabeth Flores Ferro, Universidad Bernardo O'Higgins

Escuela de Educación Física, Deporte y Recreación.

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Published

2023-05-15

How to Cite

1.
Maureira Cid F, Díaz Muñoz H, Hadweh Briceño M, Bravo Rojas P, Flores Ferro E. Non-linear analysis of the electroencephalogram gamma wave in an attention and inhibition test. Rev Cubana Inv Bioméd [Internet]. 2023 May 15 [cited 2025 Aug. 14];42(1). Available from: https://revibiomedica.sld.cu/index.php/ibi/article/view/1114

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ARTÍCULOS ORIGINALES