| Noninvasive Localization of Epileptic Sites from Stable Phase Synchronization Patterns on Different Days Derived from Short Duration Interictal Scalp dEEG. | |
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MedLine Citation:
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PMID: 22699282 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The stochastic behavior of the phase synchronization index (SI) on different days during a hospital stay of epileptic patients was studied for noninvasive localization of the epileptogenic areas from high density (256 channel) scalp EEG recordings. The study was performed on three subjects with interictal EEG data on different days. The seizure areas were localized with subdural recordings with an 8 × 8 grid electrode array. The study was performed in low gamma (30-50 Hz) band with short duration (0-180 s), seizure-free and spike-free scalp EEG data. A detrended fluctuation analysis was used to find the averaged stochastic fluctuations in the SI. The phase synchronization was computed after taking Hilbert transform of the EEG data. Contour plots were constructed with 20 s time-frames using a montage of the layout of 256 electrode positions. It was found that the stochastic behavior of the SI was higher in epileptogenic areas on different days for each subject. Also, a stable higher pattern of SI emerged after 60-100 s in the epileptogenic areas. These findings suggest that it is possible to localize the epileptogenic areas from the short duration (60-100 s), seizure-free and spike-free high density scalp EEG recordings. |
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Authors:
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Ceon Ramon; Mark D Holmes |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-6-15 |
Journal Detail:
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Title: Brain topography Volume: - ISSN: 1573-6792 ISO Abbreviation: - Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-6-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8903034 Medline TA: Brain Topogr Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Electrical Engineering, University of Washington, Campus Box 352500, Seattle, WA, 98195, USA, ceon@uw.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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