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Visual cortex plasticity study in visual impairment patients with non invasive brain stimulation method

Research Project

Project/Area Number 15K20289
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Ophthalmology
Research InstitutionJikei University School of Medicine

Principal Investigator

Yoshimine Shoyo  東京慈恵会医科大学, 医学部, 助教 (80570332)

Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2016: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords白質 / 拡散強調MRI / 加齢黄斑変性 / Tractography / White matter / Diffusion MRI / TMS / 視覚再建 / MRI / ナビゲーションシステム / 脳可塑性
Outline of Final Research Achievements

We would investigate visual cortex plasticity study in visual impairment patients with non invasive brain stimulation method. The patients could not accept their brain stimulation. It was difficult to value the phosphene even in normals and the phosphene was not replicable.We investigated the impact of age-related macular degeneration (AMD) on visual acuity and the visual white matter. We combined an adaptive cortical atlas and diffusion-weighted magnetic resonance imaging (dMRI) and tractography to separate optic radiation (OR) projections to different retinal eccentricities in human primary visual cortex. We found differences in white matter properties specific to OR white matter fascicles projecting to primary visual cortex locations corresponding to the location of retinal damage (fovea).

Academic Significance and Societal Importance of the Research Achievements

加齢黄斑変性患者の脳白質は網膜変性の影響を受ける可能性が示唆された。さらに視野偏心度ごとに脳白質を解析することで、視力障害と相関して白質線維の変化をきたしているであろう解剖学的位置も特定することができた。これらの結果は昨今期待が高まっているiPS細胞などを用いた視覚再建治療の際に、その治療の適応や治療効果判定の際のターゲットとなる可能性が示唆された。網膜変性が脳白質まで影響を及ぼした場合、その治療が網膜再建のみで良いのか、脳白質を含めた視路の再建も必要であるのかを検討する必要があると考えられた。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (2 results)

All 2018 2016

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Age-related macular degeneration affects the optic radiation white matter projecting to locations of retinal damage2018

    • Author(s)
      Yoshimine Shoyo、Ogawa Shumpei、Horiguchi Hiroshi、Terao Masahiko、Miyazaki Atsushi、Matsumoto Kenji、Tsuneoka Hiroshi、Nakano Tadashi、Masuda Yoichiro、Pestilli Franco
    • Journal Title

      Brain Structure and Function

      Volume: 223 Issue: 8 Pages: 3889-3900

    • DOI

      10.1007/s00429-018-1702-5

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 視野偏心度に基づいた加齢黄斑変性患者の視路白質変化2016

    • Author(s)
      吉嶺松洋
    • Organizer
      視野学会
    • Place of Presentation
      神戸
    • Year and Date
      2016-05-14
    • Related Report
      2016 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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