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1993 Fiscal Year Final Research Report Summary

test of zone activity hypothesis II

Research Project

Project/Area Number 03670054
Research Category

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

Allocation TypeSingle-year Grants
Research Field Neurophysiology and muscle physiology
Research InstitutionToyama Medical and Pharmaceutical University

Principal Investigator

SATO Yu  Toyama Medical and Pharmaceutical University, Faculty of Medicine, Associate Professor, 医学部, 助教授 (60111746)

Project Period (FY) 1991 – 1993
KeywordsCerebellum / Purkinje cell / simple spike / complex spike / zone
Research Abstract

We recorded the CS activity together with concomitant simple spike (SS) activity of the floccular Purkinje cells that responded to large-field visual pattern movement in the anesthetized cat. On the basis of the direction selectivity, we divided the cells into two major types : the horizontal stimuli and the vertical type that preferred vertical stimuli. The CS activity of the horizontal type cell increased during stimuli directed contralaterally to the recording site and decreased during ipsilaterally directed stimuli, while that of the vertical type cell increased during upward stimuli and decreased during downward stimuli. In both types, the CS response was larger at lower velocity stimuli, and the response was well maintained at higher velocity stimuli up to 180 ゚/s tested. The majority of the horizontal type cells were modulated by the stimuli presented to either eye, and the dominant eye was ipsilateral to the recording site. The majority of the vertical type cells were also modulated by the stimuli presented to either eye without obvious differences between two eyes. The receptive field of the ipsilateral eye always included the area centralis and extended widely on both visual hemifields. The CS and SS responses were reciprocal to each other, that is, when the CS firing increased, the SS firing decreased and vice versa.

  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] Hiroaki Fushiki: "Climbing fiber responses of Purkinje cells to retinal image movement in cat cerebellar flocculus" J.Neurophysiol.(in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yu.Sato: "Complex spike responses of cerebellar Purkinje cells to constant velocity optokinetic stimuli in the cat flocculus." Acta Otolaryngol(Stockh). Suppl.504. 13-16 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akira Miura: "Direction selective climbing fiber responses to horizontal and vertical optokinetic stimuli in the cat cerebellar flocculus" Acta Otolaryngol(Stockh). Suppl.504. 17-20 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroaki Fushiki, Yu Sato, Akira Miura, and Tadashi Kawasaki: "Climbing fiber responses of Purkinje cells to retinal image movement in cat cerebellar flocculus" J.Neurophysiol. in press.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yu Sato, Akira Miura, Hiroaki Fushiki, Tadashi Kawasaki, and Yukio Watanabe: "Complex spike responses of cerebellar Purkinje cells to constant velocity optokinetic stimuli in the cat flocculus" Acta Otolaryngol. Suppl. 504. 13-16 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akira Miura, Yu Sato, Yukio Watanabe, Hiroaki Fushiki, and Tadashi Kawasaki: "Direction selective climbing fiber responses to horizontal and vertical optokinetic stimuli in the cat cerebellar flocculus" Acta Otolaryngol. Suppl. 504. 17-20 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yu Sato, Akira Miura, Hiroaki Fushiki, and Tadashi Kawasaki: "Barbiturate depresses simple spike activity of cerebellar Purkinje cells after climbing fiber input" J.Neurophysiol. 69. 1082-1090 (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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