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A MEG study on visual information processing for spontaneous blinks and blackout during visual attention

Research Project

Project/Area Number 13680876
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Neuroscience in general
Research InstitutionOsaka Prefecture University

Principal Investigator

ASAKA Hiroshi  Osaka Pref. Univ., Earth & Life Sciences., Research Associate, 総合科学部, 助手 (50151030)

Co-Investigator(Kenkyū-buntansha) YAMADA Fumio  Osaka Pref. College of Nursing, Psychology, Professor, 看護学部, 教授 (50183687)
TONOIKE Mitsuo  Kansai-center of AIST, Life Electronics, Lab Deputy Chief, 関西センター・ライフエレクトロニクスセンタ, 副ラボ長
FUKUDA Yutaka  Graduate School of Medicine, Osaka Univ., Professor, 医学系研究科・情報生理, 教授 (90028598)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordsspontaneous blinks / visual attention / magnetoencephalogram / parieto-occipital area / artificial blackout / visual image / extrastriate cortex / switching mechanism / シータ律動 / 認知的注意 / 中心窩画像
Research Abstract

Flow of visual information into the brain is disrupted several times a minute by blinking. When the pupil is covered by the eyelid for about 100 to 150 msec, one can be hardly aware of the blackout of visual flow. On the other hand, it has been also known mat blinks are modified by attention. In this study, we used MEG (magneto-encephalogram) system and investigated how the blink-related activity is modulated by subjects' visual attention. We first investigated the wave components of the blink-related activity in the occipital and parieto-occipital cortices and then compared them with the similar wave components activated by artificial blinks where light was turned off for 100-200 msec. Secondly, we investigated how different levels of visual attention affects these wave components in both spontaneous and artificial blink-related MEG activities.
We found that the activity in the extrastriate cortex induced about 200msec after spontaneous blinks disappeared when subjects were inattentive … More to the numerical figures presented in frost of the eyes. The similar MEG components recorded after blackout of light input did not change depending on the state of subject's attention to numbers. While none of the wave components were affected by the level of visual attention during artificial blinks, the slow components during spontaneous blinks, which appear in the parieto-occipital cortices, were significantly attenuated at lower levels of visual attention. These results support the hypothesis that the activity in the extrastriate area immediately after blinks is related to the filling-rip mechanism of visual image and suggest that the processing of information during spontaneous blinks may be regulated according to the level of visual attention before blinking.
We conclude that visual information processing during spontaneous blinks is similar to that during the artificial "blackout" but the later processing of this information in higher visual cortices is actively controlled by the state of visual attention. Less

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 浅田 博, 福田 淳: "前頭正中部θ律動と能動的注意の持続機構"日本神経回路学会誌. 8巻4号. 147-152 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 浅田 博, 福田 淳, 山田冨美雄, 外池光雄: "選択的注視時の視覚情報維持に関与する頭頂後頭部皮質 -自発性瞬目および暗転刺激反応の脳磁図解析-"臨床脳波. 44巻4号. 229-233 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 浅田 博: "注意と画像の有無が影響する瞬目直後の後頭部皮質反応の脳磁図解析"生理心理学と精神生理学. 20巻2号. 178 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Asada, Y.Fukuda, M.Mizutani, M.Tonoike, et al.: "EFFECTS OF VISUAL ATTENTION ON OCCIPITAL ACTIVITIES INDUCED BY BLINKS : A MEG STUDY ON HUMAN SUBJECTS"Abstract of Neuroscience 2002 Annual Meeting. CD版. Program No.476.10 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 浅田 博, 水谷充良, 山口雅彦, 外池光雄, 福田 淳: "自発性瞬目における後頭部皮質視覚活動の脳磁図による解析"神経眼科. 20巻1号(印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hiroshi Asada, Yutaka Fukuda: "Enduring brain mechanisms of frontal midline theta rhythms and active attention"The brain & neural net works. 8,(4). 147-152 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Asada, Y. Fukuda, E Yamada, M. Tonoike: "Parieto-occipital cortical activities related to short term visual memory during selective visual attention"Rinshd noha. 44(4). 229-233 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hiroshi Asada: "A MEG analysis of occipital activities just after blinks affected by attention and visual images"Jpn. J. of Physiol. Psychol. Psychophysiol.. 20(2). 178 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Asada, M, Mizutani, M. Yamaguchi, M. Tonoike, Y. Fukuda: "Effects of visual attention on occipital activities induced by blinks: a MEG study on human subjects"Abstract of Neuroscience 2002 Annual Meting. 476 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Asada, M, Mizutani, M. Yamaguchi, M. Tonoike, Y. Fukuda: "A MEG study on visual information processing during spontaneous blinks"Neuro-Ophthalmology Japan,. 20(1) in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 浅田博: "選択的注視時の視覚情報維持に関与する頭頂後頭部皮質-自発性瞬目および暗転刺激反応の脳磁図解析-"臨床脳波. 44巻4号. 229-233 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 浅田博: "注意と画像の有無が影響する瞬目直後の後頭部皮質反応の脳磁図解析"生理心理学と精神生理学. 20巻2号. 178 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hiroshi Asada: "EFFECTS OF VISUAL ATTENTION ON OCCIPITAL ACTIVITIES INDUCED BY BLINKS : A MEG STUDY ON HUMAN SUBJECTS"Abstract of Neuroscience 2002 Annual Meeting. (CD-ROM). (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 浅田博: "自発性瞬目における後頭皮質視覚活動の脳磁図による解析"神経眼科. 20巻1号(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 浅田博: "前頭正中部θ律動と能動的注意の持続機構"日本神経回路学会誌. 8巻4号. 147-152 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 浅田博: "選択的注視時の視覚情報維持に関与する頭頂後頭部皮質"臨床脳波. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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