Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks
Objective: Diurnal variations in EEG activity and subjectively rated sleepiness while performing repeated vigilance tasks were examined. Methods: Nine diurnally active healthy males underwent repeated vigilance tasks at 08:00, 11:00, 14:00, 17:00 and 20:00 h. An electroencephalogram (EEG) was taken...
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| Veröffentlicht in: | Clinical neurophysiology 2001-06, Vol.112 (6), p.997-1000 |
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| creator | Higuchi, Shigekazu Liu, Yang Yuasa, Takao Maeda, Akira Motohashi, Yutaka |
| description | Objective: Diurnal variations in EEG activity and subjectively rated sleepiness while performing repeated vigilance tasks were examined.
Methods: Nine diurnally active healthy males underwent repeated vigilance tasks at 08:00, 11:00, 14:00, 17:00 and 20:00 h. An electroencephalogram (EEG) was taken while the subjects performed the tasks with their eyes open. The alpha power spectra (8.6–13.3 Hz) of EEG was integrated. Subjectively rated sleepiness, reaction time and oral temperature were also measured.
Results: Significant diurnal variations were found for alpha power, subjectively rated sleepiness and oral temperature. The alpha power was significantly smaller at 08:00 than at 11:00, 14:00, 17:00 and 20:00 h. The subjectively rated sleepiness was significantly larger at 08:00 than at 11:00, 17:00 and 20:00 h. The diurnal variation in alpha power did not correspond to that in subjectively rated sleepiness. On the other hand, repeated vigilance tasks increased the alpha power, subjectively rated sleepiness and reaction time at each time of day. The increase in alpha power was significantly greater at 14:00 than at 08:00 and 20:00 h.
Conclusions: The diurnal variation was found in alpha power while performing vigilance tasks. Furthermore, the increase in alpha power with repetition of the task depended on the time of day. |
| doi_str_mv | 10.1016/S1388-2457(01)00527-2 |
| format | Article |
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Methods: Nine diurnally active healthy males underwent repeated vigilance tasks at 08:00, 11:00, 14:00, 17:00 and 20:00 h. An electroencephalogram (EEG) was taken while the subjects performed the tasks with their eyes open. The alpha power spectra (8.6–13.3 Hz) of EEG was integrated. Subjectively rated sleepiness, reaction time and oral temperature were also measured.
Results: Significant diurnal variations were found for alpha power, subjectively rated sleepiness and oral temperature. The alpha power was significantly smaller at 08:00 than at 11:00, 14:00, 17:00 and 20:00 h. The subjectively rated sleepiness was significantly larger at 08:00 than at 11:00, 17:00 and 20:00 h. The diurnal variation in alpha power did not correspond to that in subjectively rated sleepiness. On the other hand, repeated vigilance tasks increased the alpha power, subjectively rated sleepiness and reaction time at each time of day. The increase in alpha power was significantly greater at 14:00 than at 08:00 and 20:00 h.
Conclusions: The diurnal variation was found in alpha power while performing vigilance tasks. Furthermore, the increase in alpha power with repetition of the task depended on the time of day.</description><identifier>ISSN: 1388-2457</identifier><identifier>EISSN: 1872-8952</identifier><identifier>DOI: 10.1016/S1388-2457(01)00527-2</identifier><identifier>PMID: 11377257</identifier><language>eng</language><publisher>Shannon: Elsevier Ireland Ltd</publisher><subject>Adult ; Alpha power of EEG ; Alpha Rhythm - methods ; Analysis of Variance ; Arousal - physiology ; Beta Rhythm - methods ; Biological and medical sciences ; Circadian Rhythm - physiology ; Diurnal variation ; Fundamental and applied biological sciences. Psychology ; Humans ; Male ; Oral temperature ; Post lunch dip ; Reaction Time - physiology ; Repeated vigilance task ; Sleep. Vigilance ; Sleepiness ; Theta Rhythm - methods ; Time Factors ; Vertebrates: nervous system and sense organs</subject><ispartof>Clinical neurophysiology, 2001-06, Vol.112 (6), p.997-1000</ispartof><rights>2001 Elsevier Science Ireland Ltd</rights><rights>2001 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c508t-e21f2df04453ac91edcf72b58c81719c3ea77723997656e4bf79051d410fe4383</citedby><cites>FETCH-LOGICAL-c508t-e21f2df04453ac91edcf72b58c81719c3ea77723997656e4bf79051d410fe4383</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S1388-2457(01)00527-2$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,3550,23930,23931,25140,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1128735$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11377257$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Higuchi, Shigekazu</creatorcontrib><creatorcontrib>Liu, Yang</creatorcontrib><creatorcontrib>Yuasa, Takao</creatorcontrib><creatorcontrib>Maeda, Akira</creatorcontrib><creatorcontrib>Motohashi, Yutaka</creatorcontrib><title>Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks</title><title>Clinical neurophysiology</title><addtitle>Clin Neurophysiol</addtitle><description>Objective: Diurnal variations in EEG activity and subjectively rated sleepiness while performing repeated vigilance tasks were examined.
Methods: Nine diurnally active healthy males underwent repeated vigilance tasks at 08:00, 11:00, 14:00, 17:00 and 20:00 h. An electroencephalogram (EEG) was taken while the subjects performed the tasks with their eyes open. The alpha power spectra (8.6–13.3 Hz) of EEG was integrated. Subjectively rated sleepiness, reaction time and oral temperature were also measured.
Results: Significant diurnal variations were found for alpha power, subjectively rated sleepiness and oral temperature. The alpha power was significantly smaller at 08:00 than at 11:00, 14:00, 17:00 and 20:00 h. The subjectively rated sleepiness was significantly larger at 08:00 than at 11:00, 17:00 and 20:00 h. The diurnal variation in alpha power did not correspond to that in subjectively rated sleepiness. On the other hand, repeated vigilance tasks increased the alpha power, subjectively rated sleepiness and reaction time at each time of day. The increase in alpha power was significantly greater at 14:00 than at 08:00 and 20:00 h.
Conclusions: The diurnal variation was found in alpha power while performing vigilance tasks. Furthermore, the increase in alpha power with repetition of the task depended on the time of day.</description><subject>Adult</subject><subject>Alpha power of EEG</subject><subject>Alpha Rhythm - methods</subject><subject>Analysis of Variance</subject><subject>Arousal - physiology</subject><subject>Beta Rhythm - methods</subject><subject>Biological and medical sciences</subject><subject>Circadian Rhythm - physiology</subject><subject>Diurnal variation</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Male</subject><subject>Oral temperature</subject><subject>Post lunch dip</subject><subject>Reaction Time - physiology</subject><subject>Repeated vigilance task</subject><subject>Sleep. Vigilance</subject><subject>Sleepiness</subject><subject>Theta Rhythm - methods</subject><subject>Time Factors</subject><subject>Vertebrates: nervous system and sense organs</subject><issn>1388-2457</issn><issn>1872-8952</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkE1PVTEQhhuCAUR_AqYLYnRxtO05ve1ZGYOgJiQu1HXT205h8HzROecS_r2Fe4nuWM0snnfmzcPYiRQfpJCrjz9lbW2lGm3eCfleCK1MpfbYkbRGVbbVar_sT8ghe0l0I4QwolEH7FDK2hilzRHrv-CSB9_xjc_oZxwH4jhw303Xnk_jHWQeYSCc77kfIqdlfQNhxg1w6gAmHICI311jB3yCnMbc43DFM0zgZ4h8g1fY-SEAnz39oVfsRfIdwevdPGa_L85_nX2rLn98_X72-bIKWti5AiWTikk0ja59aCXEkIxaaxusNLINNXhT-tdta1Z6Bc06mVZoGRspEjS1rY_Z2-3dKY-3C9DseqQAXakC40LOCGuNblcF1Fsw5JEoQ3JTxt7neyeFe_DsHj27B4lOSPfo2amSe7N7sKx7iP9SO7EFON0BnoLvUi4SkP7jlDW1LtinLQbFxgYhOwoIxVfEXDy7OOIzTf4CD2CbZw</recordid><startdate>20010601</startdate><enddate>20010601</enddate><creator>Higuchi, Shigekazu</creator><creator>Liu, Yang</creator><creator>Yuasa, Takao</creator><creator>Maeda, Akira</creator><creator>Motohashi, Yutaka</creator><general>Elsevier Ireland Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20010601</creationdate><title>Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks</title><author>Higuchi, Shigekazu ; Liu, Yang ; Yuasa, Takao ; Maeda, Akira ; Motohashi, Yutaka</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c508t-e21f2df04453ac91edcf72b58c81719c3ea77723997656e4bf79051d410fe4383</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2001</creationdate><topic>Adult</topic><topic>Alpha power of EEG</topic><topic>Alpha Rhythm - methods</topic><topic>Analysis of Variance</topic><topic>Arousal - physiology</topic><topic>Beta Rhythm - methods</topic><topic>Biological and medical sciences</topic><topic>Circadian Rhythm - physiology</topic><topic>Diurnal variation</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Male</topic><topic>Oral temperature</topic><topic>Post lunch dip</topic><topic>Reaction Time - physiology</topic><topic>Repeated vigilance task</topic><topic>Sleep. Vigilance</topic><topic>Sleepiness</topic><topic>Theta Rhythm - methods</topic><topic>Time Factors</topic><topic>Vertebrates: nervous system and sense organs</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Higuchi, Shigekazu</creatorcontrib><creatorcontrib>Liu, Yang</creatorcontrib><creatorcontrib>Yuasa, Takao</creatorcontrib><creatorcontrib>Maeda, Akira</creatorcontrib><creatorcontrib>Motohashi, Yutaka</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Clinical neurophysiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Higuchi, Shigekazu</au><au>Liu, Yang</au><au>Yuasa, Takao</au><au>Maeda, Akira</au><au>Motohashi, Yutaka</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks</atitle><jtitle>Clinical neurophysiology</jtitle><addtitle>Clin Neurophysiol</addtitle><date>2001-06-01</date><risdate>2001</risdate><volume>112</volume><issue>6</issue><spage>997</spage><epage>1000</epage><pages>997-1000</pages><issn>1388-2457</issn><eissn>1872-8952</eissn><abstract>Objective: Diurnal variations in EEG activity and subjectively rated sleepiness while performing repeated vigilance tasks were examined.
Methods: Nine diurnally active healthy males underwent repeated vigilance tasks at 08:00, 11:00, 14:00, 17:00 and 20:00 h. An electroencephalogram (EEG) was taken while the subjects performed the tasks with their eyes open. The alpha power spectra (8.6–13.3 Hz) of EEG was integrated. Subjectively rated sleepiness, reaction time and oral temperature were also measured.
Results: Significant diurnal variations were found for alpha power, subjectively rated sleepiness and oral temperature. The alpha power was significantly smaller at 08:00 than at 11:00, 14:00, 17:00 and 20:00 h. The subjectively rated sleepiness was significantly larger at 08:00 than at 11:00, 17:00 and 20:00 h. The diurnal variation in alpha power did not correspond to that in subjectively rated sleepiness. On the other hand, repeated vigilance tasks increased the alpha power, subjectively rated sleepiness and reaction time at each time of day. The increase in alpha power was significantly greater at 14:00 than at 08:00 and 20:00 h.
Conclusions: The diurnal variation was found in alpha power while performing vigilance tasks. Furthermore, the increase in alpha power with repetition of the task depended on the time of day.</abstract><cop>Shannon</cop><pub>Elsevier Ireland Ltd</pub><pmid>11377257</pmid><doi>10.1016/S1388-2457(01)00527-2</doi><tpages>4</tpages></addata></record> |
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| subjects | Adult Alpha power of EEG Alpha Rhythm - methods Analysis of Variance Arousal - physiology Beta Rhythm - methods Biological and medical sciences Circadian Rhythm - physiology Diurnal variation Fundamental and applied biological sciences. Psychology Humans Male Oral temperature Post lunch dip Reaction Time - physiology Repeated vigilance task Sleep. Vigilance Sleepiness Theta Rhythm - methods Time Factors Vertebrates: nervous system and sense organs |
| title | Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks |
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