| Analysis of pattern reversal visual evoked potentials (PRVEP's) by spline wavelets. | |
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MedLine Citation:
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PMID: 9282480 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In this study, the pattern-reversal visual evoked potentials (PRVEP's) collected from normal and demented subjects are investigated by applying the quadratic spline wavelet analysis. The data are decomposed into six octave frequency bands. For quantitative purposes, the wavelet coefficients in the residual waveform representing the delta-theta band activity (0-8 Hz) are explored to characterize the (N70-P100-N130) complex. Specifically, the coefficients corresponding to the location of N70, P100, and N130 peaks are investigated for their sign in order to test whether they represent a consistent (N70-P100-N130) complex in the averaged waveform. Waveforms with normal latency (N70-P100-N130) complex are observed to have positive second, negative third, and positive fourth coefficients in amplitude in their residual scale standing for the delta-theta (0-8 Hz) band activity. The method allows for the analysis of oscillatory-phase behavior of the normal and pathological PRVEP's in their delta-theta band based on a few quantitative measures consistent with the time-frequency occurrence of the major components of the evoked potential. |
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Authors:
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A Ademoglu; E Micheli-Tzanakou; Y Istefanopulos |
Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article |
Journal Detail:
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Title: IEEE transactions on bio-medical engineering Volume: 44 ISSN: 0018-9294 ISO Abbreviation: IEEE Trans Biomed Eng Publication Date: 1997 Sep |
Date Detail:
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Created Date: 1997-09-16 Completed Date: 1997-09-16 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0012737 Medline TA: IEEE Trans Biomed Eng Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 881-90 Citation Subset: IM |
Affiliation:
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Institute of Biomedical Engineering, Bogazici University, Bebek, Istanbul, Turkey. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Alzheimer Disease
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diagnosis,
physiopathology Delta Rhythm Electroencephalography Evoked Potentials, Visual* Humans Reaction Time / physiology Signal Processing, Computer-Assisted* Theta Rhythm |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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