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2004 Fiscal Year Final Research Report Summary

Evaluation of subjective sleepiness on shift workers and the bright light therapy

Research Project

Project/Area Number 14510107
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 実験系心理学
Research InstitutionHosei University

Principal Investigator

TAKAHASHI Toshiharu  Hosei University, Faculty of Letters, Professor, 文学部, 教授 (10171505)

Project Period (FY) 2002 – 2004
Keywordsshift work / alternate / bright light / objective sleepiness / subjective sleepiness / sleep / MSLT / mood
Research Abstract

I intend to analyze the decline of performance and the change of mood caused by sleepiness of shift workers. I examined the improvement of sleepiness and mood by the bright light-therapy. The subjects were 7 university students who were physiologically and psychologically. They averaged 21.9 years of age. Before entering the study I gave them the explanation in writing as to the process and risk of the experiment, and they consented to it. I set two days for the baseline, and shifted the sleep schedule for 10 hours. In one experiment, the subjects spent the two days in the fluorescent light under 500 lux (DL condition). In the other experiment, the same subjects were exposed to bright light over 2,500 lux from 18:00 to 22:00 for the two days after the shift (BL condition).. I examined the sleep parameter by the polysomnography, the objective sleepiness by Multiple Sleep Latency Test (MSLT), and the subjective sleepiness by Visual Analog Scale(VAS) and Stanford Sleepiness Scale(SSS). The subjects had worn Actigraph from 3 days before the experiment to the end, and it was proved that they didn't have a nap during the experiment. ANOVA was statistically applied on both DL condition and BL condition. There were no differences in sleep parameters between on DL condition and on BL condition. In VAS sleepiness significantly decreased and alertness significantly increased on BL condition compared to DL condition. MSLT score was significantly elevated. In this way, we see the sleepiness on the next day can be improved by bright-light therapy done soon at the early timing after getting up. It turned out that it was effective for alternate-working system in controlling the sleepiness and keeping the alertness to be exposed to bright light at the early timing after waking up.

  • Research Products

    (12 results)

All 2004 2003 2002

All Journal Article (10 results) Book (2 results)

  • [Journal Article] 昼間部と夜間部の大学生における睡眠・覚醒状態の比較検討2004

    • Author(s)
      高橋敏治
    • Journal Title

      法政大学文学部紀要 49

      Pages: 65-74

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 2交代制シフト時の高照度光による睡眠と眠気・気分の変化2004

    • Author(s)
      高橋敏治
    • Journal Title

      宇宙航空環境医学 41

      Pages: 128-128

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Comparison of sleep-wake pattern between university students in daytime class and those in evening class (in Japanese)2004

    • Author(s)
      T Takahashi
    • Journal Title

      Bulletin of the Faculty of Letters Hosei University 49

      Pages: 65-74

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effects of bright light exposure for 4 hour in the evening on sleep structure, sleepiness and subjective mood after a 10-hour sleep-wake phase-delayed (in Japanese)2004

    • Author(s)
      T Takahashi, et al.
    • Journal Title

      Japanese Journal of Aerospace and Evironmental medicine 41

      Pages: 128

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Comparison of a westward flight and an eastward flight in the circadian rhythms of plasma melatonin2003

    • Author(s)
      T Takahashi, et al.
    • Journal Title

      Sleep and Biological Rhythms 1

      Pages: 163-164

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Melatonin alleviates jet lag symptoms caused by an 11-hour eastward flight2002

    • Author(s)
      T Takahashi, et al.
    • Journal Title

      Psych.Clin.Neurosci 56

      Pages: 301-302

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 時差ぼけの科学2002

    • Author(s)
      高橋敏治
    • Journal Title

      教育学会誌 29

      Pages: 3-14

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The scientific study of jet lag (in Japanese)2002

    • Author(s)
      T Takahashi
    • Journal Title

      Kyoikugakkaishi 29

      Pages: 3-14

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Sleep disturbance induced by jet lag and shift-work (in Japanese)2002

    • Author(s)
      T Takahashi
    • Journal Title

      Handbook of sleep-wake disorders for clinical physicians(Medical Review)

      Pages: 82-87

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 1.Sleep disturbance caused by jet lag syndrome 2.Sleep disturbance caused by shift works (in Japanese)2002

    • Author(s)
      T Takahashi
    • Journal Title

      Countermeasure and therapeutic guidelines to sleep disorders(Jihou, Inc.)

      Pages: 179-185

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 臨床医のための睡眠・覚醒障害ハンドブック(大川匡子監修、内山真編集)2002

    • Author(s)
      高橋敏治
    • Total Pages
      147
    • Publisher
      メデイカルビュー社(大阪)
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 睡眠障害の対応と治療ガイドライン(内山真編集)2002

    • Author(s)
      高橋敏治
    • Total Pages
      269
    • Publisher
      株式会社じほう(東京)
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2006-07-11  

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