MUSCLE SPINDLE RESPONSES TO VIBRATORY STIMULI AT CERTAIN FREQUENCIES

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  • 高野 光司
    Department of Physiology, School of Medicine, Chiba University
  • 本間 三郎
    Department of Physiology, School of Medicine, Chiba University

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1. Vibratory stimuli from 25-500c/s were applied to the cat's triceps surae muscle. The group Ia discharge from the muscle spindle was obtained from the dorsal root filament.<BR>2. The new term “response ratio”, which shows the number of spikes res ponding to one cycle of vibration, was used and this ratio observed at every vibratory frequency.<BR>3. There were sometimes a few gaps or valleys in the response's ratiofrequency curve, the frequency of which showed simple integral relations, such as one to two or two to three.<BR>4. The discharge patterns at every frequency changed in a staircase manner.<BR>5. It was discussed that these phenomena may be due to the physical properties of each muscle spindle.

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