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Type: Journal article
Title: Investigating how electroencephalogram measures associate with delirium: a systematic review
Author: Boord, M.S.
Moezzi, B.
Davis, D.
Ross, T.J.
Coussens, S.
Psaltis, P.J.
Bourke, A.
Keage, H.A.D.
Citation: Clinical Neurophysiology, 2021; 132(1):246-257
Publisher: Elsevier
Issue Date: 2021
ISSN: 1388-2457
Statement of
Monique S.Boord, Bahar Moezzi, Daniel Davis; Tyler J.Ross, Scott Coussens, Peter J.Psaltis, Alice Bourke, Hannah A.D.Keage
Abstract: Delirium is a common neurocognitive disorder in hospital settings, characterised by fluctuating impairments in attention and arousal following an acute precipitant. Electroencephalography (EEG) is a useful method to understand delirium pathophysiology. We performed a systematic review to investigate associations between delirium and EEG measures recorded prior, during, and after delirium. A total of 1,655 articles were identified using PsycINFO, Embase and MEDLINE, 31 of which satisfied inclusion criteria. Methodological quality assessment was undertaken, resulting in a mean quality score of 4 out of a maximum of 5. Qualitative synthesis revealed EEG slowing and reduced functional connectivity discriminated between those with and without delirium (i.e. EEG during delirium); the opposite pattern was apparent in children, with cortical hyperexcitability. EEG appears to have utility in differentiating those with and without delirium, but delirium vulnerability and the long-term effects on brain function require further investigation. Findings provide empirical support for the theory that delirium is a disorder of reduced functional brain integration.
Keywords: EEG; electroencephalography; delirium; review
Rights: © 2021 The Authors. Published by Elsevier B.V. on behalf of International Federation of Clinical Neurophysiology.
DOI: 10.1016/j.clinph.2020.09.009
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