| Ictal wideband ECoG: Direct comparison between ictal slow shifts and high frequency oscillations. | |
| | |
MedLine Citation:
|
PMID: 21353632 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
OBJECTIVE: With advanced electroencephalography (EEG) technology, 'wideband EEG' ranging from slow shift to high frequency oscillation (HFO) is clinically available to study human epileptogenesis. The purpose of our study is to clarify the relationship between slow shift, HFO and conventional electrocorticographic (ECoG) change. METHODS: A patient with right temporal lobe epilepsy who underwent presurgical evaluation with subdural electrodes was studied. Slow shift and HFO were evaluated in 16 habitual seizures with wideband EEG technique (bandpass filter of 0.016-600Hz). RESULTS: Upon seizure occurrence in wideband ECoG, negative slow shifts coexisted with HFO (100-300Hz) in the ictal onset zone in all investigated seizures. The former always preceded HFO and conventional initial EEG changes by mean value of 1.6 and 20.4s, respectively. The slow shifts and HFOs were observed only in the restricted ictal onset zone. CONCLUSIONS: In this particular patient, wideband EEG could delineate both ictal slow shift and HFO to define ictal onset zone, and the earliest occurrence of slow shifts may suggest an early role of glia in slow EEG shift generation than neurons. SIGNIFICANCE: The time difference of the onset between ictal HFO and slow shift may help to understand epileptogenesis. |
| | |
Authors:
|
Hisaji Imamura; Riki Matsumoto; Morito Inouchi; Masao Matsuhashi; Nobuhiro Mikuni; Ryosuke Takahashi; Akio Ikeda |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-2-24 |
Journal Detail:
|
Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: - ISSN: 1872-8952 ISO Abbreviation: - Publication Date: 2011 Feb |
Date Detail:
|
Created Date: 2011-2-28 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
|
Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Shared mechanisms in perception and imagery of auditory accents.
Next Document: Reorganization of functional connectivity during the motor task using EEG time-frequency cross mutua...