MASSETERIC MONOSYNAPTIC REFLEX IN CHRONIC CAT

  • 榎本 武
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 福岡 和子
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 今井 康雄
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 賀古 真
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 金子 義保
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 三島木 みゆき
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 小野 曄子
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo
  • 久保田 競
    Department of Neurophysiology, Brain Research Institute, Faculty of Medicine, University of Tokyo

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1) In the unanesthetized chronic cat the monosynaptic reflex responses were recorded from the masseter nerve or from the masseter and temporal muscles, after giving shocks to the trigeminal mesencephalic tract.<BR>2) In the para-sleep phase the monosynaptic reflex response was smaller than in the preceding ortho-sleep phase. Transient facilitation and depression were also found during para-sleep. Threshold for the reflex elicitation increased slightly during para-sleep.<BR>3) In awake relaxed state the reflex response was not larger than that of ortho-sleep.

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