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Studies on the characteristics of open eye parameters and physiological parameters to vigilance level

Research Project

Project/Area Number 06805035
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionShizuoka University

Principal Investigator

NAKAMURA Takabun  Grad.Sch.Electron.Sci.Technol., Shizuoka Univ., Research Associate, 大学院電子科学研究科, 助手 (70144061)

Co-Investigator(Kenkyū-buntansha) UCHIDA Katsuhisa  1st Dep.Physiol., Hamamatsu Univ.Sch.Med., Research Associate, 医学部, 助手 (10168693)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1995: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
KeywordsVigilance Level / Car Driving / Monitoring / Eye Openness / Eye Movement / Blink / Electoencepharogram / Electrocardiogram / 開眼状態 / 瞬目回数
Research Abstract

In the present study, quantitative elucidation of relationship between the vigilance level and various parameters of the open eyes and physiological parameters was investigated. A video screen of simulating car driving was presented to nine healthy adult subjects while eye openness, blinking frequency, eye movement, EEG (O_z-C_z, C_3-C_z), ECG and sleepiness (Kuwansei Gakuin Sleepiness Scale, KSS) were recorded. Recordings were made at midnight in four sections consisting of each 15-20 min session interspaced by a 5-10 min rest period and at the daytime in one session. Mean values of each parameter were obtained for each recording session.
The blinking frequency initially increased with increasing of KSS but decreased with further increasing of KSS and individual variations were considerable in this parameter. Eye openness remained nearly the same as in the high arousal level up to ca.4.7 of KSS,above which it rapidly decreased with increasing of KSS.Eye movement decreased as KSS increased, but the mode of decrease was relatively linear in comparison with eye openness. In the EEG,the %alpha-power and its gradient increased with increasing of KSS.The %delta-power tended to decrease above 4.5 of KSS.The %beta-power tended to decrease with increasing of KSS without reaching the level of statistical significance. The %rheta-power did not show any significant changes. In the ECG,the R-R interval and the degree of its fluctuation increased with increasing of KSS.From these results it was suggested that 1) eye openness could be a good indicator of intense drowsiness, 2) the %alpha-power of the EEG is a good parameter of vigilance level, 3) there may be some correlation between the parameter changes of the open eyes and those of EEG and ECG.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 中村孝文: "覚醒レベルに対する開瞼、瞬目、眼球運動、各特性の解析" 医用電子と生体工学(第34回日本ME学会大会論文集). 33. 301- (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 中村孝文: "ねむけ度に対する脳波、心電図の特性及び開眼状態との関係について" 第25回日本脳波・筋電図学会学術大会予稿集. 196- (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 中村孝文: "覚醒度の変化に対する脳波パワーの特性解析及び開眼状態との相関について" 第21回日本睡眠学会学術集会に発表予定. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nakamura T., Morita Y.and Uchida K.: "Influences of vigilance level to eye opening, blink and eye movement" Jpn.J.Med.Electron.Biol.Eng.33 Suppl. 301 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nakamura T., Morita Y.and Uchida K.: "On the relationships of characteristics of EEG and ECG to vigilance level and to open eye parameters" Proc.33th Conf.Jpn.Soc.EEG & EMG. 196 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 中村孝文: "覚醒レベルに対する開瞼、瞬目、眼球運動、各特性の解析" 医用電子と生体工学(第34回日本ME学会大会論文集). 33. 301 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 中村孝文: "ねむけ度に対する脳波、心電図の特性及び開眼状態との関係について" 第25回日本脳波・筋電図学会学術大会予稿集. 196 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 中村孝文: "覚醒度の変化に対する脳波パワーの特性解析及び開眼状態との相関について" 第21回日本睡眠学会学術集会. (発表予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 中村孝文: "覚醒レベルに対する開瞼、瞬目、眼球運動、各特性の解析" 第34回日本エム・イ-学会大会. 発表予定. (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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