Dimensional complexity of the EEG in patients with posttraumatic stress disorder

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Recent electrophysiological studies have reported evidence of information processing abnormalities in patients with posttraumatic stress disorder (PTSD). The aim of this study is to examine dynamical complexity of the EEG in PTSD patients, which is thought to reflect information processing of the brain. Resting EEG recordings (32 800 data points acquired continuously from 82 s of an EEG record) were obtained in 16 channels of 27 patients with PTSD from a mixed civilian trauma population and 14 healthy subjects. The correlation dimension (D-2) of the EEG was used to quantify the complexity of the cortical dynamics underlying the EEG signal. The PTSD patients were found to have lower D-2 values than those of the healthy subjects in most channels (Fp1, F8, C4, P4, T3, T4, T5, T6, and O1), indicating that PTSD patients have globally reduced complexity in their EEG waveforms. This study supports the hypotheses that PTSD patients exhibit disturbed cortical information processing, and that non-linear dynamical analysis of the EEG can be a tool for detecting changes in neurodynamics of the brain in PTSD. (C) 2004 Elsevier Ireland Ltd. All rights reserved.
Publisher
ELSEVIER IRELAND LTD
Issue Date
2004-05
Language
English
Article Type
Article
Keywords

POSITRON-EMISSION-TOMOGRAPHY; OPTIMAL EMBEDDING DIMENSION; SCRIPT-DRIVEN IMAGERY; CEREBRAL-BLOOD-FLOW; ALZHEIMERS-DISEASE; TIME-SERIES; COMBAT VETERANS; SYMPTOM PROVOCATION; STRANGE ATTRACTORS; MUTUAL INFORMATION

Citation

PSYCHIATRY RESEARCH-NEUROIMAGING, v.131, pp.79 - 89

ISSN
0925-4927
URI
http://hdl.handle.net/10203/21283
Appears in Collection
BiS-Journal Papers(저널논문)PH-Journal Papers(저널논문)
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