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Differentiation processes of the brain stem reticular formation in the amphibia

Research Project

Project/Area Number 61570029
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 神経解剖学
Research InstitutionNagasaki University

Principal Investigator

IWAHORI Nobuharu  Professor of Anatomy, Nagasaki University, 医学部, 教授 (80025626)

Co-Investigator(Kenkyū-buntansha) MAMEYA Chisako  Assistant Professor of Anatomy, Nagasaki University, 医学部, 助手 (00209686)
NAKAMURA Kaori  Assistant Professor of Anatomy, Nagasaki University, 医学部, 助手 (30198197)
清田 悦子  長崎大学, 医学部, 助手 (70186352)
横平 弥生  長崎大学, 医学部, 助手 (90174862)
Project Period (FY) 1986 – 1988
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1988: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1987: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1986: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsBrain stem reticular formation / Differentiation / Amphibia / イモリ / ニホンアカガエル / カスミサンショウウオ
Research Abstract

The differentiation processes of the brain stem reticular formation were analyzed in the frog, salamander and triturus, using the Nissl, Weil and rapid Golgi methods.
The brain stem in these animals was at first composed exclusively of the mantle layer. At later embryonic stages, the marginal layer differentiated peripherally. In the course of development, cells in the mantle layer began to migrate into the marginal layer which was originally composed mainly of fibers. Cells migrated into the marginal layer formed such nuclei and layers as the raphe nuclei and the superficial cellular layers of the optic tectum. Excluding the cells in these nuclei and layers from those distributed in the marginal layer, the remainder of the neurons were regarded in the present study as reticular cells. The region of the marginal layer invaded by reticular cells formed the reticular formation. As the development proceeded, many of fibers in the marginal layer were myelinated and cells in that layer, especially reticular neurons, were embedded among numerous myelinated fibers to form characteristic features of the reticular formation.
Thus, the reticular formation is (1) originally the white matter, (2) formed by the migration of neurons in the mantle layer into the whiter matter, and (3) embryologically homologous to various nuclei and layers in the peripheral white.

Report

(4 results)
  • 1989 Final Research Report Summary
  • 1988 Annual Research Report
  • 1987 Annual Research Report
  • 1986 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Iwahori,N.,Nakamura,K.,Mameya,C.,: "Development of the brain stem reticular formation in the frog,Rana japonica." Anat.Anz.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori,N.,Nakamura,K.,Mameya,C.,: "Differentiation of the brain stem structures in the aslamander,Hynobius nebulosus." Anat.Anz.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori,N.,Nakamura,K.,Mameya,C.,: "Differentiation of the brain stem reticular formation in the triturus,Triturus pyrrhopaster." Okajimas Folia Anat.Jap.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori,N.,Nakamura,K.,Mameya,C.,: "A Golgi study on the main olfactory bulb in the snake Elaphe quadrivirgata." Neurosci.Res.,. 6. 411-425 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori,N.,Nakamura,K.,Mameya,C.,: "A Golgi study on the accessory olfactory bulb in the snake,Elaphe quadrivirgata." Neurosci.Res.,. 7. 55-70 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 岩堀修明: "神経細胞の発生" 病態生理. 8. 87-93 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 岩堀修明: "新生理科学大系 巻10 運動の生理学" 医学書院, 12 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori, N., K. Nakamura & C. Mameya: "Development of the brain stem reticular formation in the frog, Rana japonica." Anat. Anz.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori, N., K. Nakamura & C. Mameya: "Differentiation of the brain stem structures in the salamander, Hynobius nebulosus." Anat. Anz.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori, N., K. Nakamura & C. Mameya: "Differentiation of the brain stem reticular formation in the triturus, Triturus pyrrhogaster." Okajimas Folia Anat. Jap. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori, N., K. Nakamura & C. Mameya: "A Golgi study on the main olfactory bulb in the snake Elaphe quadrivirgata." Neurosci. Res.6. 411-425 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Iwahori, N., K. Nakamura & C. Mameya: "A Golgi study on the accessory olfactory bulb in the snake, Elaphe quadrivirgata." Neurosci. Res.7. 55-70 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Iwahori,;K.Nakamura,;C.Mameya.: Neuroscience Research.

    • Related Report
      1988 Annual Research Report
  • [Publications] 岩堀修明: 病態生理. 8. 87-93 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 岩堀修明: "新生理科学大系 巻10 運動の生理学" 医学書院, 142-154 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] N. Iwahori & E. Kiyota: Neuroscience Research. 4. 454-474 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] N. Iwahori & E. Kiyota: Neuroscience Research. 5. 113-125 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] N. Iwahori & E. Kiyota: Neuroscience Research. 5. 126-139 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] N. Iwahori;E. Kiyota & K. Nkamura: Okajima Folia Anatomica Japonica. 64. 183-192 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] N.Iwahori: Neuroscience Research.

    • Related Report
      1986 Annual Research Report
  • [Publications] N.Iwahori: Neuroscience Research.

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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