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• W4225165265 abstract "Abstract The analysis of human EEG has traditionally focused on oscillatory power, which is characterized by peaks above an aperiodic component in the power spectral density. This study investigates the aperiodic EEG component of individuals in a disorder of consciousness (DOC); how it changes in response to exposure to anesthesia; and how it relates to the brain’s information richness and criticality. High-density EEG was recorded from 43 individuals in a DOC, with 16 of these individuals undergoing a protocol of propofol anesthesia. The aperiodic component was defined by the spectral slope of the power spectral density. Our results demonstrate that the EEG aperiodic component is more informative about the participants’ level of consciousness than the oscillatory component. Importantly, the pharmacologically induced change in the spectral slope from 30-45 Hz positively correlated with individual’s pre-anesthetic level of consciousness. The pharmacologically induced loss of information-richness and criticality was associated with individual’s pre-anesthetic aperiodic component. During exposure to anesthesia, the aperiodic component was correlated with 3-month recovery status for individuals with DOC. The aperiodic EEG component has been historically neglected; this research highlights the necessity of considering this measure for the assessment of individuals in DOC and future research that seeks to understand the neurophysiological underpinnings of consciousness." @default.
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• W4225165265 date "2022-04-27" @default.
• W4225165265 modified "2023-10-03" @default.
• W4225165265 title "Aperiodic brain activity and response to anesthesia vary in disorders of consciousness" @default.
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• W4225165265 doi "https://doi.org/10.1101/2022.04.22.489199" @default.
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