Hemispheric asymmetry in non-linear interdependence of EEG in post-traumatic stress disorder

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Aim: While volumetric and metabolic imaging on post-traumatic stress disorder (PTSD) patients has been intensively performed, few studies using electroencephalograms (EEG) have been done as yet. The aim of the present study was to investigate abnormalities in functional connectivity of cortical networks in PTSD. Methods: Non-linear interdependence (NI), a measure of bidirectional, non-linear information transmission between two time series, was used. Resting EEG were recorded for 18 PTSD patients and 18 sex-matched healthy subjects on 16 channels with their eyes closed. Results: The NI patterns in PTSD patients were hemisphere asymmetric: an increase in NI in the fronto-parieto-temporal regions of the left hemisphere (F7, F3, T3, C3, T5 and P3) and a decrease in the fronto-parieto-occipital regions of the right hemisphere (F4, C4, P4 and O2). The non-linearity of NI in EEG, estimated from the surrogate data method, exhibited an increase in the PTSD patients as compared with that of healthy subjects, particularly in the left hemispheric cortex. Conclusion: Abnormal functional connectivity in PTSD can be assessed using NI, a measure of multichannel EEG.
Publisher
WILEY-BLACKWELL
Issue Date
2012-03
Language
English
Article Type
Article
Keywords

MUTUAL INFORMATION ANALYSIS; MILD COGNITIVE IMPAIRMENT; HIPPOCAMPAL N-ACETYLASPARTATE; MULTICHANNEL HUMAN EEG; ALZHEIMERS-DISEASE; DYNAMICAL INTERDEPENDENCE; SCHIZOPHRENIC-PATIENTS; EMBEDDING DIMENSION; VOLUME; SYNCHRONIZATION

Citation

PSYCHIATRY AND CLINICAL NEUROSCIENCES, v.66, no.2, pp.87 - 96

ISSN
1323-1316
DOI
10.1111/j.1440-1819.2011.02300.x
URI
http://hdl.handle.net/10203/99573
Appears in Collection
BiS-Journal Papers(저널논문)
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