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Neural bases of shifting visual attention depending on the level of cognitive processes

Research Project

Project/Area Number 14570577
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Neurology
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SUZUKI Kyoko  Tohoku University, Hospital, Lecturer, 病院, 講師 (20271934)

Co-Investigator(Kenkyū-buntansha) FUJII Toshikatsu  Tohoku University, Graduate School of Medicine, Associate Professor, 大学院・医学系研究科, 助教授 (70271913)
NAKASATO Nobukazu  Kohnan Hospital, Dept Neurosurgery, Senior Researcher, 脳神経外科, 臨床研究部長(研究職) (80207753)
MORI Etsuro  Tohoku University, Graduate School of Medicine, Professor, 大学院・医学系研究科, 教授 (30368477)
山鳥 重  東北大学, 大学院・医学系研究科, 教授 (10030892)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsVisual attention / Alexia / Simultanagnosia / Electrocortical stimulation / Electrocorticogram / Kanji / Alzheimer's disease / Constructional apraxia / 皮質電位 / gamma band / 脳梗塞 / 視覚性注意障害
Research Abstract

We performed clinical and experimental studies to investigate neuronal bases of shifting selective visual attention depending on the level of cognitive processes.
1.Clinical studies
(1)Alzheimer's disease(visual variant)
Patients with slowly pregoressive visuospatial impairment performed various visuopeceptive and visuoconstuctive tasks. When the patients started particular tasks, which require detailed visual analysis, their range of visual attention became extremely narrow. MR images demonstrated severe cerebral atrophy predominantly in parieto-occipital lobes.
(2)Cerebral infarction
Patients with bilateral parietal infarctions demonstrated unique type of simultanagnosia, being unable to notice lines among columns in a newspaper. Experimental investigations revealed that they could detect lines among meaningless figures or patterns, but could not detect lines among Japanese characters.
2.Studies using subdural electrodes
(1)Cortical mapping of visual attention
Mapping of visual attention was … More performed in patients with intractable epilepsy, using compound letter tasks for global/local attention shift and oral line bisection tasks for spatial attention. In limited parts of the right parietal lobe, electrical stimulation induced impairment on either of two tasks, indicating partly independent neural networks for different type of attention.
(2)Event-related electrocorticogram
We recorded electrocorticograms from the bilateral basal temporal cortices in a patient with epilepsy and evaluated the task-related "high-gamma-band" activity (HGBA) accompanying picture naming and lexical decision tasks. Significant differences in HGBA were observed between the Japanese kanji and kana words, and between the kanji words and kanji pseudowords.
3.Neuroimagning studies with functional MRI (fMRI)
We used fMRI to explore the change in brain activation associated with the learning of Korean words written in Han-gul characters (K-words). Functional MRIs were measured twice before learning 20 Korean words and after the learning period for 2 weeks. Reading of K-words only after learning engaged the left angular gyrus, the same area as J-words reading, which indicated the change of visual attention, perception and reading processes over learning. Less

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (21 results)

All 2005 2004 2003 Other

All Journal Article (14 results) Publications (7 results)

  • [Journal Article] High-frequency gamma band activity in the basal temporal cortex during picture naming and lexical decision tasks2005

    • Author(s)
      Tanji K, et al.
    • Journal Title

      Journal of Neuroscienc 25

      Pages: 3287-3293

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Anomic alexia of kanji in a patient with anomic aphasia2005

    • Author(s)
      Yamawaki R, et al.
    • Journal Title

      Cortex (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Proper name anomia after left temporal subcortical hemorrhage2005

    • Author(s)
      Otsuka Y, et al.
    • Journal Title

      Cortex 41

      Pages: 39-47

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Proper name anomia after left temporal subcortical Hemorrhage2005

    • Author(s)
      Otsuka Y, et al.
    • Journal Title

      Cortex 41

      Pages: 39-47

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Anomic alexia of kanji in a patient with anomic aphasia2005

    • Author(s)
      Yamawaki R, Suzuki K, Tanji K, et al.
    • Journal Title

      Cortex (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] High-frequency gamma band activity in the basal temporal cortex during picture naming and lexical decision tasks.2005

    • Author(s)
      Tanji K, Suzuki K, Delorne A, et al.
    • Journal Title

      Journal of Neuroscienc (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Proper name anomia after left temporal subcortical hemorrhage.2005

    • Author(s)
      Otsuka Y, Suzuki K, Fujii T, et al.
    • Journal Title

      Cortex 41

      Pages: 39-47

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Neuromagnetic evaluation of binaural unmasking2005

    • Author(s)
      Sasaki T, Kawase T, Nakasato N et al
    • Journal Title

      NeuroImage (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 熟字訓の音読が良好な左利き右半球性失読症例2004

    • Author(s)
      鈴木妙美, 鈴木匡子, 飯塚統ら
    • Journal Title

      脳と神経 56

      Pages: 679-684

    • NAID

      40019912248

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Neural correlates of context memory with real-world events2004

    • Author(s)
      Fujii T, Suzuki M, Okuda J et al
    • Journal Title

      NeuroImage 21

      Pages: 1596-1603

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Visuospatial deficits due to impaired visual attention : Investigation of two cases of slowly progressive visuospatial impairment.2003

    • Author(s)
      Suzuki K, et al.
    • Journal Title

      Cortex 39

      Pages: 327-342

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Different spatial processing for stimulus-centered and body-centered representations.2003

    • Author(s)
      Ota H, et al.
    • Journal Title

      Neurology 60

      Pages: 1846-1848

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Changes in brain activation patterns associated with learning of Korean words by Japanese : An fMRI study.2003

    • Author(s)
      Lee HS, et al.
    • Journal Title

      Neuroimage 20

      Pages: 1-11

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Anomic alexia of kanji in a patient with anomic Aphasia

    • Author(s)
      Yamawaki R, et al.
    • Journal Title

      Cortex (In press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Suzuki K, Otsuka Y, Endo K, Fujii T, Yamadori A: "Visuospatial deficits due to impaired visual attention : Investigation of two cases of slowly progressive visuospatial impairment"Cortex. 39. 327-342 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Tanji K, Suzuki K, Okuda J, et al.: "Fonmant interaction as a cue to vowel perception : A case report"Neurocase. 9. 350-355 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Otsuka Y, Suzuki K, Fujii T, et al.: "Proper name anomia after left temporal subcortical hemorrhage"Cortex. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 鈴木匡子: "視覚処理とその障害の無認知"神経心理学. 19. 104-111 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Lee HS, Fujii T, Okuda J, et al.: "A.Changes in brain activation patterns associated with learning of Korean words by Japanese : An fMRI study"Neuroimage. 20. 1-11 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Suzuki K, Otsuka Y, Endo K, Fujii T, Yamadori A: "Visuospatial deficits due to impaired visual attention : Investigation of two cases of slowly progressive visuospatial impairment"Cortex. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Suzuki K, Otsuka Y, Sugawara A, Okuda J, Nakasato N, Yamadori A: "Frontiers of human memory"Yamadori A, Kawashima R, Fujii T, Suzuki K ed.Tohoku University Press, Sendai. 315 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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