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A mathematical study on information expression of auditory cortex: Neural mechanisms of auditory continuity illusion

Research Project

Project/Area Number 16K00220
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Cognitive science
Research InstitutionNumazu National College of Technology

Principal Investigator

Msanobu Miyashita  沼津工業高等専門学校, 制御情報工学科, 教授 (20443038)

Co-Investigator(Kenkyū-buntansha) 田中 繁  電気通信大学, 脳科学ライフサポート研究センター, 特任教授 (70281706)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords聴覚野 / 連続聴効果 / トノトピック・マップ / 自己組織化 / スパイク放電型モデル / 音声周波数 / 音圧 / 皮質内相互作用 / 音圧構造 / 周波数受容野 / 音圧受容野 / 周波数チューニング / 神経ダイナミクス / 一次聴覚野 / 心理物理実験 / 音圧特性 / カラーノイズ / スパイク応答モデル / 神経科学 / 錯聴現象
Outline of Final Research Achievements

The auditory continuity illusion is a well-known phenomenon: When a continuous melody is masked with periodically repeated silent periods (gaps), we feel the melody to be unpleasantly fragmented. However, when the periodic gaps are further replaced with band-pass noise, we hear the continuous melody as a background of the periodic noise. To elucidate the neural mechanisms underlying this illusion theoretically, we performed simulation of the self-organization of afferent inputs from the model medial geniculate body (MGB) to form the AI-like neural network with the tonotopic map. In the dynamical simulation, we used the integrate-and-fire neuron model as a cortical neuron that received the self-organized afferent inputs and lateral inputs from other excitatory and inhibitory neurons in the network. We found that tonotopic neuronal arrangements and lateral interactions in AI are crucial factors for the generation of auditory continuity illusion.

Academic Significance and Societal Importance of the Research Achievements

錯聴現象は、神経の活動というミクロな現象が「認識」というマクロな現象として表出したものと捉えることができる。連続聴効果は錯聴現象の一つであるが、何故連続音が知覚されるのか?という問題に対する神経基盤は不明な点が残されている。本研究では、心理物理実験と数理モデル研究を組み合わせることで、この神経メカニズムを予測した。実際に、音声の空白部分に挿入するノイズの強度を低くすると、連続した音声が知覚され難くなることを心理物理実験で示したが、心理物理実験での音圧の点移転と数理モデルによって予測された点移転は良く一致していた。また、連続音の知覚には、皮質内の興奮・抑制の神経活動が関係していることを示した。

Report

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

    (12 results)

All 2018 2017 2016

All Journal Article (1 results) Presentation (11 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] コラム構造形成の理論2016

    • Author(s)
      田中繁、宮下真信
    • Journal Title

      Clinical Neuroscience

      Volume: 34 Pages: 880-884

    • Related Report
      2016 Research-status Report
  • [Presentation] A spiking network model of the rodent visual cortex for the understanding of what visual information is represented2018

    • Author(s)
      Masanobu Miyashita and Shigeru Tanaka
    • Organizer
      Society for Neuroscience
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A mathematical model predicts functional properties of rodent visual cortical neurons2018

    • Author(s)
      Masanobu Miyashita and Shigeru Tanaka
    • Organizer
      日本神経科学学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] A computational model for the generation of auditory continuity illusion2017

    • Author(s)
      Masanobu Miyashita and Shigeru Tanaka
    • Organizer
      日本神経科学学会
    • Related Report
      2017 Research-status Report
  • [Presentation] A theoretical study of cortical neural dynamics for the generation of auditory continuity illusion2017

    • Author(s)
      Masanobu Miyashita and Shigeru Tanaka
    • Organizer
      Society for Neuroscience
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Neural mechanisms of auditory continuity illusion2017

    • Author(s)
      Masanobu Miyashita and Shigeru Tanaka
    • Organizer
      The 4th Annual Meeting of the Society for Bioacoustics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Lateral connections in the visual cortex are important in the formation of orientation representation and information preservation2016

    • Author(s)
      Ishikawa, S., Miyashita, M., Horikawa, J., and Tanaka, S.
    • Organizer
      The Society for Bioacostic
    • Place of Presentation
      伊良湖
    • Year and Date
      2016-12-10
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] A computational study of neural dynamics in the auditory cortex for the generation of auditory continuity illusion2016

    • Author(s)
      Endo, T., Miyashita, M., Horikawa, J., and Tanaka, S.
    • Organizer
      The Society for Bioacostic
    • Place of Presentation
      伊良湖
    • Year and Date
      2016-12-10
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] A role of lateral connections in the formation of orientation representation efficiently preserving visual information2016

    • Author(s)
      Miyashita, M., Ishikawa, S., Horikawa, J., and Tanaka, S.
    • Organizer
      Society for Neuroscience
    • Place of Presentation
      SanDiego, USA
    • Year and Date
      2016-11-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大脳聴覚野における神経ダイナミクスの数理モデル研究2016

    • Author(s)
      Endo, T., and Myashita, M.
    • Organizer
      高専学会
    • Place of Presentation
      沼津
    • Year and Date
      2016-08-27
    • Related Report
      2016 Research-status Report
  • [Presentation] 方位表現の規則性と視覚情報保持に関する理論研究2016

    • Author(s)
      Miyashita, M., and Tanaka, S.
    • Organizer
      視覚科学フォーラム
    • Place of Presentation
      大阪
    • Year and Date
      2016-08-25
    • Related Report
      2016 Research-status Report
  • [Presentation] Functional roles of orientation representation for visual information preservation2016

    • Author(s)
      Ishikawa, S., Miyashita, M., Horikawa, J., and Tanaka, S.
    • Organizer
      日本神経科学会
    • Place of Presentation
      横浜
    • Year and Date
      2016-07-20
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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