Analysis of electroencephalography brain rhythms in the reading process

Camila Davi Ramos Izabella Nonato Oliveira Lima Amanda Luiza Rodrigues Kaliny Alice Carvalho de Oliveira Magalhães Aurélia Aparecida de Araújo Rodrigues João-Batista Destro-Filho About the authors

ABSTRACT

Objective:

To verify if, by three distinct quantifiers, the measured electroencephalographic signal at rest is different from the signal measured during a word reading situation, especially considering the faster rhythms, gamma and high-gamma, as it occurs in clinical rhythms (delta to beta).

Methods:

A total of 96 electroencephalographic signals measured from neurologically healthy volunteers were evaluated at two moments: resting and word reading. Each signal segment was measured by three quantifiers that separately assess normalized power, percent power, and right and left hemisphere coherence. The Mann-Whitney test was used to compare the results of the quantifiers in each brain range.

Results:

The gamma and high-gamma rhythms presented a more distinct behavior when comparing the analyzed moments (resting and reading) than the clinical rhythms.

Conclusion:

This finding contributes to the scarce literature on faster rhythms, which can contain information that is normally disregarded in neurological clinical practice.

Keywords:
Electroencephalography; Reading; Gamma rhythm; Delta rhythm; Beta rhythm

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