| A DC attenuator allows common EEG equipment to record fullband EEG, and fits fullband EEG into standard European Data Format. | |
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MedLine Citation:
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PMID: 20538516 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: Traditional electroencephalogram (EEG) recorders reject low frequencies and DC and therefore cannot handle fullband EEG. Dedicated fullband recorders use non-standard file formats, because the standard format (EDF) cannot handle large DC electrode offset voltages. Both facts limit the development and use of fullband EEG. We developed a modification that allows conventional equipment to record fullband EEG, and adapts both types of recorders to EDF. METHODS: The modification is a simple filter that attenuates the DC component and thus makes the EEG fit within traditional equipment limitations and EDF. The review software automatically 'de-attenuates' the DC component, without loss of information. RESULTS: DC attenuation by a factor of 10 made both types of recorders store DC attenuated fullband EEG into EDF files. Recordings were made during 0.5-24h in 46 subjects. The DC de-attenuator automatically reconstructed the original fullband EEG within an amplitude range of ±100mV and with a resolution of 0.3μV. Using sintered Ag-AgCl electrodes attached with common procedures, reconstructed DC EEG in spontaneously moving subjects ranged between ±32mV. CONCLUSIONS: The modification works. Fullband recordings can now be analyzed by independent software, archived and exchanged. SIGNIFICANCE: Any EEG system can be made to record fullband EEG into standard EDF. |
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Authors:
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Bob Kemp; Teunis van Beelen; Marion Stijl; Paul van Someren; Marco Roessen; J Gert van Dijk |
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Publication Detail:
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Type: Journal Article Date: 2010-06-09 |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: 121 ISSN: 1872-8952 ISO Abbreviation: Clin Neurophysiol Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-01 Completed Date: 2010-11-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 1992-7 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Neurology, Leiden University Medical Centre, Leiden, The Netherlands. b.kemp@lumc.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Brain
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physiology Data Interpretation, Statistical* Electric Stimulation / instrumentation*, methods Electroencephalography* / instrumentation, methods, standards Europe Humans Software Syncope / pathology, physiopathology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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