Electroencephalography is a widely used tool for both routine examinations and follow-up to critically ill patients admitted to Intensive Care Unit (ICU) settings. Thus, this work studies the quantitative differences of the EEG performed for two groups of Brazilian individuals (n = 25 control and n = 25 coma), considering the frequency range 0 – 100 Hz. The EEG was analyzed by estimating the power spectral density and its time variations. It was found that the amplitude and topographic distribution of delta rhythms - coma group - and alpha - control - consist of the main quantitative differences within the classical neurologic range of 0 – 40 Hz, which agrees with well-establishded knowledge of the field. Accurate description of gamma and supergamma characteristics is provided, pointing out significant changes regarding the time variations of the supergamma power for comatose patients.

XII SIMPÓSIO DE ENGENHARIA BIOMÉDICA - IX SIMPÓSIO DE INSTRUMENTAÇÃO E IMAGENS MÉDICAS