| Improving the saccade peak velocity measurement for detecting fatigue. | |
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MedLine Citation:
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PMID: 20083140 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of the study was to compare saccadic peak velocity (SPV) values measured with video based Fitness Impairment Tester (FIT) and electro-oculography (EOG) during prolonged wakefulness. We tested different numbers of saccades and two saccade paradigms to improve the EOG measurements for detecting fatigue. The SPVs were measured from 11 fast patrol boat navigators with FIT and EOG every sixth hour until 54 h. Subjective sleepiness was assessed with the Karolinska Sleepiness Scale. EOG was measured using an overlap and a gap paradigm and the data was divided into sequential five 20-saccade blocks and cumulative blocks of 20, 40, 60, 80, and 100 saccades. Compared to the gap paradigm, the overlap paradigm produced a higher number of analyzable saccades for a given measurement time. The shorter measurements (20-40 saccades) appeared to be more sensitive for fatigue, whereas the longer measurements (60-100 saccades) were more sensitive to time spent on the task. Thus, the optimal number of saccades varies also depending on the research question. The EOG method was more sensitive to fatigue than FIT. The FIT values measured after 30 and 36 h of wakefulness did not differ significantly from the baseline values, while subjective sleepiness and the EOG values showed that the participants were significantly less alert at these time points. The EOG measurements can be improved for detecting fatigue by using the overlap saccade paradigm. The SPV values measured with the EOG method appear to be somewhat more sensitive in detecting fatigue than the FIT method. |
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Authors:
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Kati Hirvonen; Sampsa Puttonen; Kristian Gould; Jussi Korpela; Vilhelm F Koefoed; Kiti M?ller |
Publication Detail:
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Type: Journal Article Date: 2010-01-18 |
Journal Detail:
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Title: Journal of neuroscience methods Volume: 187 ISSN: 1872-678X ISO Abbreviation: J. Neurosci. Methods Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-04 Completed Date: 2010-05-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7905558 Medline TA: J Neurosci Methods Country: Netherlands |
Other Details:
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Languages: eng Pagination: 199-206 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Brain Work Research Centre, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, 00250 Helsinki, Finland. Kati.Hirvonen@ttl.fi |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Electrooculography Eye Movements / physiology Humans Male Mental Fatigue / diagnosis*, physiopathology Physical Fitness / physiology Reproducibility of Results Saccades / physiology* Sleep Deprivation / physiopathology Sleep Stages / physiology Young Adult |
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