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Neural basis for spatial estimation processing in the visual system

Research Project

Project/Area Number 18K18341
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90030:Cognitive science-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Hisakata Rumi  東京工業大学, 工学院, 助教 (30588950)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Discontinued (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords空間知覚 / 密度順応 / 視覚情報処理 / 実験心理学 / 空間視 / fMRI / 心理実験
Outline of Final Research Achievements

The main purpose of our visual system is to recognize "what" and "where" from visual information. Applicants have recently discovered that adapting to dense textures reduces the visibility of subsequent object-to-object distances and stimulus sizes. The purpose of this study was to identify and examine the brain regions involved in density-distance adaptation using magnetic resonance functional imaging and behavioral experiments. In the fMRI measurement experiment of Study 1, Rapid event-related fMRI was used to compare the brain activity to the test stimulus after adaptation, and the activity to the adaptation stimulus was observed in the visual cortex. In addition, behavioral experiments revealed that the stimulus adaptation time and refresh frequency affect the adaptation effect.

Academic Significance and Societal Importance of the Research Achievements

本研究から、密度距離順応現象の時間特性が明らかになった。刺激の順応時間とリフレッシュ頻度が、その後に呈示されるテスト刺激の知覚サイズに影響するということは、この順応現象が比較的高次の処理段階で発生していることを示している。具体的には、Walsh(2003)で提案されているようなマグニチュード推定処理に関与しているだろう。マグニチュード推定では、数・時間・空間の「量」が同じ段階・同じ脳領野で処理されていると言われている。今回、順応刺激の時間的な「量」であるリフレッシュ頻度が、その後の空間推定を過小にしており、テスト刺激のサイズ推定はこのマグニチュード推定段階で処理されている可能性を示唆している。

Report

(3 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Research-status Report
  • Research Products

    (3 results)

All 2019 2018

All Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Temporal property of the density-size adaptation effect2019

    • Author(s)
      Rumi Hisakata and Hirohiko Kaneko
    • Organizer
      Vision Sciences Society
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spatial property of the effect of density-adaptation on perceived distances.2018

    • Author(s)
      R. Hisakata, H. Kaneko.
    • Organizer
      OSA Fall Vision Meeting 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 密度ーサイズ順応効果の時間特性2018

    • Author(s)
      久方瑠美, 金子寛彦
    • Organizer
      日本視覚学会2018年夏季大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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