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Neural mechanisms of olfactory learning in insect 'Microbrain'

Research Project

Project/Area Number 11168201
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (A)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionTOHOKU UNIVERSITY (2001-2002)
Hokkaido University (1999-2000)

Principal Investigator

MIZUNAMI Makoto  Grad. Sch. Life Sci. Assoc. Prof., 大学院・生命科学研究科, 助教授 (30174030)

Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥55,200,000 (Direct Cost: ¥55,200,000)
Fiscal Year 2001: ¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 2000: ¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1999: ¥44,600,000 (Direct Cost: ¥44,600,000)
KeywordsMemory / Learning / Brain / Insect / Olfaction / Motor control / Sensory processing / Sensory map / コオロギ / キノコ体 / 一酸化窒素 / 中期記憶 / ゴキブリ / 嗅覚学習 / 連合記憶
Research Abstract

The aim of this study was to reveal functional organization of insect "microbrain" and to reveal neural mechanisms of olfactory learning in insect brain. At first, I invented several olfactory learning paradigms for cockroaches and crickets. These included operant and classical conditioning procedures for individual or groups of insects and they could be used for various analytical perposses. Second, using these behavioral paradigms, we showed that cockroaches and crickets have excellent olfactory learning capability characterized by fast acquisition, long retention, and easy re-writing by re-training. One of my notable finding was that crickets that had been trained in early nymphal stage could retain their olfactory memory for practically a lifetime, and that this long-lasting memory could be easily altered by subsequent re-training. Third, I have attained evidence to suggest that the NO-system in the mushroom body of crickets participates in the formation of long-term olfactory memory. Finally, I examined the distribution of somata and dendrites of descending brain neurons of the cockroach by retrogradely filling their axons from the cervical connective, and showed that there were at least 235 pairs somata of descending neurons. I proposed a model for the basic organization of the cockroach brain, on the basis of the distribution of their dendrites, where the brain consists of a number of parallel sensori-motor pathways many of which are modulated by signals from indirect pathways via higher centers

Report

(4 results)
  • 2002 Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Okada R.et al.: "Distribution of dendrites of descending neurons and its implications for the basic organization of the cockroach brain"J.Comp.Neural.. 458. 158-174 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nishino H.et al.: "Projection neurons originating from thermo-and hygrosensory glomeruli in the antennal lobe of the cockroach"J.Comp.Neural.. 455. 40-55 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sakura M.et al.: "Olfactory discrimination of structurally similar alcohols by cockroaches"J.Comp.Physiol.. 188. 787-797 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsumoto Y., Mizunami M.: "Temporal determinants of long-term retention of olfactory memory in the cricket Gryllus bimaculatus"J.Exp.Biol.. 205. 1429-1437 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsumoto Y., Mizunami M.: "Lifetime olfactory memory in the cricket Gryllus bimaculatus"J.Comp.Physiol.. 188. 295-299 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sakura M., Mizunami M.: "Olfactory learning and memory in the cockroach Periplaneta americana"Zool.Sci.. 18. 21-28 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Okada R. et al.: "Distribution of dendrites of descending neurons and its implications for the basic organization of the cockroach brain"J. Comp. Neurol.. 458. 158-174 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nishino H. et al.: "Projection neurons originating from thermo- and hygrosensory glomeruli in the antennal lobe of the cockroach"J. Comp. Neurol.. 455. 40-55 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sakura M. et al.: "Olfactory discrimination of structurally similar alcohols by cockroaches"J. Comp. Physiol.. 188. 787-797 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsumoto Y. and Mizunami M.: "Temporal determinants of long-term retention of olfactory memory in the cricket Gryllus bimaculatus"J. Exp. Biol.. 205. 1429-1437 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsumoto Y. and Mizunami M.: "Lifetime olfactory memory in the cricket Gryllus bimaculatus"J. Comp. Physiol.. 188. 295-299 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sakura M. and Mizunami M.: "Olfactory learning and memory in the cockroach Periplaneta americana"Zool. Sci.. 18. 21-28 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Sakura M.: "Olfactory learning and memory in the cockroach Periplaneta americana"Zool.Soc.. 18. 21-28 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Matsumoto Y.: "Temporal determinats of long-term retention of olfactory memory in the cricket Gyullus bimaculatus"J.Exp.Biol.. (in press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Matsumoto Y.: "Lifetime olfactory memory in the cricket Gryllus bimaculatus"J.Comp.Physiol.. (in press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 水波 誠: "もうひとつの脳〜微小脳の研究入門"培風館(印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sakura M.: "Olfactory learning and memory in the cockroach Periplaneta americana"Zool.Sci.. 18. 21-28 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Matsumoto Y.: "Olfactory learning in the cricket Gryllus bimaculatus"J.Exp.Biol.. 203. 2581-2588 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 水波誠: "もうひとっの脳〜微小脳の研究入門"培風館(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Okada R.: "Sensory responses and movement-related activies in extrinsic neurons of the cockroach mushroom bodies"J.Comp.Physiol.. 185. 115-129 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Mizunami M.: "Exploration into the adaptive design of the arthropod 'Microbrain'"Zool.Sci.. 16. 703-709 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Iwasaki M.: "Ultrastructural analysis of modular subunits in the mushroom"J.Electron Micros.. 48. 55-62 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Mizunami M.: "Springer-Verlag"Atlas of Arthropod Sensory Receptors. 220 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 水波 誠: "実験室の小さな生きものたち"羊土社. 165 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2018-03-28  

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