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Function and Self-organized Spike Pattern in Coupled Excitable System

Research Project

Project/Area Number 19540390
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionHokkaido University

Principal Investigator

TATSUO Yanagita  Hokkaido University, 電子科学研究所, 助教 (80242262)

Co-Investigator(Kenkyū-buntansha) AOYAGI Toshio  京都大学, 情報科学研究科, 講師 (90252486)
Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords興奮素子 / 自己組織化 / パターン形成 / 反応拡散系 / ニューロン・モデル / FitzHugh-Nagumo Model / 側方結合 / 時空間パターン / 同期現象 / 時空カオス / 自己 / 神経発火 / ネットワーク
Research Abstract

1. 興奮性ダイナミクスは自然界で幅広く観察される振る舞いである. 特に, 神経系における電気刺激の伝達や心筋収縮などの生物機能の重要な役割を担う性質である. 特にリエントラント波は心筋細動の起源の一つであると考えられている. 本研究では興奮場結合系で自発形成されるパルス・ダイナミクスの数値解析を徹底的に行い, その分岐構造を解明した. 具体的には一次元FitzHugh-Nagumo 方程式を側方結合したモデルにより数値実験・分岐解析を行い, リエントラント波の生成起源がパルス同期解のサドル分岐に起因している事を明らかにし, 大域分岐図を求めた. これらの研究は"ifurcation analysis ofsolitary pulse, synchronized pulses and reentrant waves in laterally coupled excitable fibers", Physical Review E, 78, p. 05628-056039(2008)等に学術雑誌に掲載された.

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (24 results)

All 2009 2008 2007

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (14 results)

  • [Journal Article] Exploration of Order in Chaos using the Replica Exchange Monte Carlo method2009

    • Author(s)
      Tatsuo Yanagita and Yukito Iba
    • Journal Title

      Journal of Statistical Mechanics 2

      Pages: 204-2058

    • Related Report
      2008 Annual Research Report 2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Co-evolution of phases and connection strengths in a network of phase oscillators2009

    • Author(s)
      Takaaki Aoki and Toshio Aoyagi
    • Journal Title

      Physical Review Letters vol.102,Issue 3

      Pages: 34101-34101

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Bifurcation analysis of solitary pulse, synchronized pulses and reentrant waves in laterally coupled excitable fibers2008

    • Author(s)
      Tatsuo Yanagita, Hiromichi Suetani and Kazuyuki Aihara
    • Journal Title

      Physical Review E 78

      Pages: 5628-56039

    • Related Report
      2008 Annual Research Report 2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Pulse Dynamics in Coupled Excitable Fibers : Soliton-like Collision, Recombination, and Overtaking2008

    • Author(s)
      Hiromichi Suetani, Tatsuo Yanagita and Kazuyuki Aihara
    • Journal Title

      International Journal of Bifurcations and Chaos 18

      Pages: 2289-2308

    • Related Report
      2008 Annual Research Report 2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Dynamics of a Market with Heterogeneous Learning Agents2008

    • Author(s)
      Tatsuo Yanagita and Tamotsu Onozaki
    • Journal Title

      Journal of Economic Interaction and Coordination 3

      Pages: 107-118

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Optimal weighted networks of phase oscillators for synchronization2008

    • Author(s)
      Takuma Tanaka and Toshio Aoyagi
    • Journal Title

      Physical Review E vol.78,Issue.4

      Pages: 46210-46210

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Input-output relation of FitzHugh-Nagumo elements arranged in a trifurcated structure2007

    • Author(s)
      Tatsuo Yanagita
    • Journal Title

      Physical Review E 76

      Pages: 56215-56228

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Synchrony-induced switching behavior of spike-pattern attractors created by spike-timing dependent plasticity2007

    • Author(s)
      Takaaki Aoki and Toshio Aoyagi
    • Journal Title

      Neural Computation Vol.19,No.10

      Pages: 2720-2738

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Synchrony-induced attractor transition in cortical neural networks organized by spike-timing dependent plasticity2007

    • Author(s)
      Takaaki Aoki and Toshio Aoyagi
    • Journal Title

      Journal of Robotics and Mechatronics Vol19,No.4

      Pages: 409-415

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Input-Output Relation of FitzHugh-Nagumo Elements Arranged in a Trifurcate Structure2007

    • Author(s)
      T. Yanagita
    • Journal Title

      Phys. Rev. E 76

      Pages: 56215-56228

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] ネットワークの結合変化と振動子ダイナミクスの相互作用が示す自発構造形成2009

    • Author(s)
      青木高明、青柳富誌生
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      池袋
    • Year and Date
      2009-03-30
    • Related Report
      2008 Final Research Report
  • [Presentation] Design of Functional Oscillatory Networks with Replica Exchange Monte Carlo2008

    • Author(s)
      T. Yanagita
    • Organizer
      Interfacial dynamics on the boundaries of physics, chemistry, biology and mathematics
    • Place of Presentation
      Sapporo
    • Year and Date
      2008-11-20
    • Related Report
      2008 Final Research Report
  • [Presentation] 振動子の同期を最適化する複雑ネットワークの重み構造2008

    • Author(s)
      田中琢真, 青柳富誌生
    • Organizer
      第66回形の科学シンポジウム
    • Place of Presentation
      京都大学(口頭)
    • Year and Date
      2008-10-31
    • Related Report
      2008 Final Research Report
  • [Presentation] 結合変化を伴う位相振動子系におけるネットワーク構造の自発形成と解析2008

    • Author(s)
      青木高明, 青柳富誌生
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      盛岡
    • Year and Date
      2008-09-22
    • Related Report
      2008 Final Research Report
  • [Presentation] 引き込みを最適化する位相振動子ネットワークの多様性-拡張アンサンブル法によるアプローチ2008

    • Author(s)
      伊賀志朗、吉井義裕、伊庭幸人、青柳富誌生
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      岩手
    • Year and Date
      2008-09-22
    • Related Report
      2008 Final Research Report
  • [Presentation] Evolutionary Design of Robust Oscillatory Networks2008

    • Author(s)
      T. Yanagita and A. Mikhilov
    • Organizer
      Pattern Formation in Biological Networks
    • Place of Presentation
      Max-Planck Institute, Germany
    • Year and Date
      2008-09-19
    • Related Report
      2008 Final Research Report
  • [Presentation] A coevolving network of phase oscillators-Typical three types of collective behaviors-2008

    • Author(s)
      Takaaki Aoki,and Toshio Aoyagi
    • Organizer
      Dynamics Days Asia Pacific 5(DDAP5)The 5th International Conference on Nonlinear Science
    • Place of Presentation
      Nara Prefectural New Public Hall, Nara
    • Year and Date
      2008-09-11
    • Related Report
      2008 Final Research Report
  • [Presentation] Extended Ensemble Monte Carlo for Designing Dynamical Systems2008

    • Author(s)
      T. Yanagita and Y. Iba
    • Organizer
      Dynamics Days Europe 2008
    • Place of Presentation
      Delft University of Technology, Holland
    • Year and Date
      2008-08-27
    • Related Report
      2008 Final Research Report
  • [Presentation] Analysis of Chaotic Dynamical System by Extended Monte Carlo Method2008

    • Author(s)
      T. Yanagita, Y. Iba
    • Organizer
      SigmaPhi2008 Statistical Physics
    • Place of Presentation
      Chania, Greece
    • Year and Date
      2008-07-20
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Extended Ensemble Monte Carlo for Designing Dynamical Systems2008

    • Author(s)
      T. Yanagita and Y. Iba
    • Organizer
      Dynamics Days Europe 2008
    • Place of Presentation
      Delft University of Tec hnology, Holland
    • Related Report
      2008 Annual Research Report
  • [Presentation] Pulse Dynamics in a Coupled Excitable Media2007

    • Author(s)
      T. Yanagita, H. Suetani, and K. Aihara
    • Organizer
      Nonlinear Dynamics and Chaos : Advances and Perspectives
    • Place of Presentation
      Aberdeen, UK
    • Year and Date
      2007-09-22
    • Related Report
      2008 Final Research Report
  • [Presentation] A Model of Market Share Dynamics with Boundedly Rational Agents2007

    • Author(s)
      T. Yanagita and T. Onozaki
    • Organizer
      The Fifth International Workshop on Agent-based Approaches in Economic and Social Complex Systems
    • Place of Presentation
      Waseda Univ., Tokyo
    • Year and Date
      2007-08-29
    • Related Report
      2008 Final Research Report
  • [Presentation] Dynamics of a Market with Heterogeneous Learning Agents2007

    • Author(s)
      T. Yanagita and T. Onozaki
    • Organizer
      ESHIA
    • Place of Presentation
      George Mason Univ., Washington DC, USA
    • Year and Date
      2007-06-20
    • Related Report
      2008 Final Research Report
  • [Presentation] Regional"Business Cycle Synchronization through Expectations"2007

    • Author(s)
      T. Onozaki and T. Yanagita
    • Organizer
      ESHIA
    • Place of Presentation
      George Mason Univ., Washington DC, USA
    • Year and Date
      2007-06-20
    • Related Report
      2008 Final Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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