| Habituation measured by pattern reversal visual evoked potentials depends more on check size than reversal rate. | |
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MedLine Citation:
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PMID: 21414838 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: Results have varied between studies of pattern-reversal visual evoked potential (PR-VEP) habituation, possibly caused by differences in stimulation parameters. Our aim was to estimate the interaction between check size and reversal rate on PR-VEP-habituation in healthy subjects. METHODS: Thirty-four healthy volunteers participated. Mid-occipital monocular PR-VEP was recorded in six consecutive blocks of 50 responses. Four conditions were applied in a random order: 1.5reversals per second (rps) with 8' checks, 1.5rps with 65' checks, 3.0rps with 8' checks and 3.0rps with 65' checks. N70-P100 and P100-N145 peak-to-peak amplitudes were blindly measured. ANOVA and regression slopes across the six blocks were used to test for habituation. RESULTS: Significant habituation slopes were found with small 8' checks while responses were stable with large 65' checks for the fast reversal rate. We found a strong trend (p=0.06) towards a significant interaction between reversal rate and check size on habituation for N70-P100. CONCLUSION: Habituation may not be detectable in healthy subjects using large 65' checks. Reversal rate had less influence than check size on habituation. The faster 3.0rps reversal rate will reduce examination time and probably prevent drowsiness. SIGNIFICANCE: Small checks and fast reversal rate may be preferable in PR-VEP habituation studies. |
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Authors:
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Petter M Omland; Kristian B Nilsen; Trond Sand |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-15 |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: - ISSN: 1872-8952 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Norwegian University of Science and Technology, Department of Neuroscience, Trondheim, Norway. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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