Avaliações de estimulações cognitivas baseadas no EEG

Abstract

The human brain is capable of making thousands of electrical and chemical connections every day and analyzing very useful high frequency signals, as it can provide information about mental activities, relate memory, and process information not seen in low frequency ranges. Music alters various brain areas, influences the entire body area of ​​the human being and also cognitive activities in general. It also causes changes in the way the brain and human body behave. Therefore, this study was developed in order to analyze a way the cognitive processes altered or traced by the EEG. The signs analyzed were neurologically healthy volunteers with authorization from the ethics committee. As the analyzes related to the musical stimulus were performed in one patient, the reading of words already had a total of 96 records analyzed, being quite significant when comparing with the literature, since the number of patients of this research is great. During a recording of cognitive processes, two events were considered, having them in common or period without stimulation. The EEG signal showed that the high frequency rhythms, during an unpleasant musical stimulation, Gama and Supergama were very prominent, caused more alterations in the other rhythms, and this was also seen while reading words, proving the cognitive stimulus caused. applicable brain changes. In contrast, the clinical signs, the major activity factors during the pleasant stimulus, and the same do not affect them very much, it can be noted that during a pleasant stimulation in the right brain region in the Delta rhythm was more frequent when compared to the moment without stimulus. Therefore, it can be said that cognitive stimuli alter or trace the EEG in different ways, taking into account the type of stimulation and that brain regions are affected in different ways in the case of pleasant stimulation.