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Cortical activation patterns in relation to tempo discrimination; representation of time interval underlying the stream segregation

Research Project

Project/Area Number 26430034
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nerve anatomy/Neuropathology
Research InstitutionTokyo Medical and Dental University

Principal Investigator

OJIMA HISAYUKI  東京医科歯科大学, 大学院医歯学総合研究科, 非常勤講師(無給) (00104539)

Co-Investigator(Kenkyū-buntansha) 堀川 順生  豊橋技術科学大学, 工学(系)研究科(研究院), 教授 (50114781)
Research Collaborator HAYASHI Koki  豊橋技術科学大学, 大学院工学研究科情報知能工学
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords一次聴覚野 / 時間表現 / 細胞活動 / テンポ / 繰返し音 / 膜電位感受性色素 / 識別学習 / モルモット / リズム処理 / 聴覚皮質 / 行動実験 / イメージング / 時間情報 / リズム識別 / 脳活動 / 条件付け / 時間間隔 / tempo / 条件づけ / 行動学
Outline of Final Research Achievements

The tempo or rhythm is an important time-related factor for determining the sound quality. We addressed questions as to animal's perceptual abilities of tempos and cortical activation patterns to sounds with different tempos.
Guinea pigs could discriminate between sounds with repeats of a segment (100ms long) at the interval-segment interval (ISI) of 1100 ms and at the ISI of 230 (or 110) ms (short-ISI), but not between the 1100 ms ISI and the much longer ISIs. In naive animals, these repeated sounds evoked AI activation (CA) only at the early 1st-2nd/3rd segments but very little at later segments for the short-ISI, while every segment was effective in evoking CA for the 1100 ms-ISI. Conditioning animals to the 1100-ms ISI changed the responsiveness to individual sound segments. Three/four-week training made later segments effective in evoking CA for the short-ISIs, while the same training increased the magnitude of CA evoked by the later segments for the longer 1100-ms ISI sound.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (10 results)

All 2017 2016 2015 2014

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results,  Acknowledgement Compliant: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Auditory-visual integration in fields of the auditory cortex.2017

    • Author(s)
      Kubota M, Sugimoto S, Hosokawa Y, Ojima H, Horikawa J.
    • Journal Title

      Hear Res.

      Volume: 346 Pages: 25-33

    • DOI

      10.1016/j.heares.2017.01.012

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cortical Activation Patterns Evoked by Temporally Asymmetric Sounds and Their Modulation by Learning.2017

    • Author(s)
      Horikawa J, Ojima H.
    • Journal Title

      eNeuro.

      Volume: 4(2) Issue: 2 Pages: 1-19

    • DOI

      10.1523/eneuro.0241-16.2017

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Recognition of Modified Conditioning Sounds by Competitively Trained Guinea Pigs2016

    • Author(s)
      Hisayuki Ojima and Junsei Horikawa
    • Journal Title

      Front. Behav. Neurosci.

      Volume: 9

    • DOI

      10.3389/fnbeh.2015.00373

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Changes in Temporal Activation Pattern of the Guinea Pig's AI after Interval Discrimination2016

    • Author(s)
      Hisayuki Ojima, Koki Hayashi, Masato Taira and Junsei Horikawa
    • Organizer
      The 39th Annual Meeting of the Japanese Neuroscience Society
    • Place of Presentation
      Yokohama, Kanagawa
    • Year and Date
      2016-07-20
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Changes in temporal pattern of AI activity after interval discrimination of repetitive sounds in guinea pigs2016

    • Author(s)
      Hayashi K, Ojima H (poster presentier), Horikawa J.
    • Organizer
      Association for Research in Otoralyngology (ARO)
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2016-02-19
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 音の時間間隔学習後の聴覚皮質活動の変化2015

    • Author(s)
      林 興輝、小島 久幸、堀川 順生
    • Organizer
      聴覚研究会
    • Place of Presentation
      豊橋、愛知県
    • Year and Date
      2015-05-28 – 2015-05-29
    • Related Report
      2014 Research-status Report
  • [Presentation] Contrast in processing of sounds played forward and reversely and learning effects on this contrast.2015

    • Author(s)
      Ojima H, Ishida T, Taira M, and Horikawa J
    • Organizer
      NIH Science Events
    • Place of Presentation
      Bethesda, MD, USA
    • Year and Date
      2015-02-25
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Mechanisms of cortical suppression evoked by the reversed form of a damping natural sound.2015

    • Author(s)
      Horikawa J. and Ojima H
    • Organizer
      38th ARO Annual Midwinter Meeting
    • Place of Presentation
      Baltimore, MD, USA
    • Year and Date
      2015-02-21 – 2015-02-25
    • Related Report
      2014 Research-status Report
  • [Presentation] Contrast between Activations Evoked by Forward and Backward Reproduction of a Natural Sound in the Auditory Cortex Increases after Classical Conditioning.2014

    • Author(s)
      Ojima H, Ishida T, Taira M, and Horikawa J
    • Organizer
      第37回日本神経科学大会
    • Place of Presentation
      横浜
    • Year and Date
      2014-09-11 – 2014-09-13
    • Related Report
      2014 Research-status Report
  • [Book] 神経研究の進歩 連合野ハンドブック 側頭連合野の聴覚情報処理2016

    • Author(s)
      福島誠、小島久幸
    • Publisher
      医学書院
    • Related Report
      2016 Annual Research Report

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Published: 2014-04-04   Modified: 2018-03-22  

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