Avaliação quantitativa do sinal EEG medido em paciente comatoso: comparativo entre silêncio e estímulo musical

Abstract

This study aims to quantitatively analyze the Electroencephalography (EEG) signals of comatose patients subjected to stimulation during silence and musical stimulation periods. The sample consisted of 21 individuals hospitalized in the Intensive Care Unit (ICU) of the Hospital das Clínicas at the Federal University of Uberlândia (HCU-UFU). The EEG signals were used to calculate two quantifiers: Power Contribution Percentage (PCP) and Coherence. The results indicated that musical stimulation led to an increase in PCP for Beta and Gamma rhythms, with higher concentration in the temporal and parietal regions. Regarding Coherence values, the greatest median variation was observed in the Delta rhythm, particularly in the F7-F8 and P3P4 electrode pairs, which showed greater sensitivity to musical stimulation, presenting the highest percentage variations. The calculation of Percentual Variation (VAP) revealed that most electrodes were concentrated in intermediate ranges of percentual variation, with both quantifiers showing variations around 20%. Overall, the results suggest that musical stimulation influences brain activity, particularly in high frequencies (Gamma and Super Gamma).