SPONTANEOUS VARIATIONS OF THE SKIN POTENTIALS AND SKIN POTENTIAL REFLEXES DURING NATURAL SLEEP IN THE CAT

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  • 新美 良純
    Department of Neurophysiology, Institute of Brain Research, School of Medicine, University of Tokyo Laboratory of Psychophysiology, Department of Psychology, Waseda University
  • 久保田 競
    Department of Neurophysiology, Institute of Brain Research, School of Medicine, University of Tokyo
  • 岩村 吉晃
    Department of Neurophysiology, Institute of Brain Research, School of Medicine, University of Tokyo

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Both spontaneous and evoked GSRs were compared at different phases of the sleep (para-sleep and ortho-sleep) in unrestrained chronic cats. The GSRs were recorded from the forelimb paw pads, using zinc with zinc sulphate electrodes.<BR>In 68 percent of 81 cases with 13 cats the number of spontaneous GSRs decreased during the para-sleep phase rather than during ortho-sleep phase, while in 32 percent it increased. The increased cases were characterized by a burst pattern composed of continuous small potentials continuing for 5 to 60 sec.<BR>In the ortho-sleep phase, stimulation of peroneal nerve fibers evoked GSRs occasionally, while in the para-sleep phase, periods of complete silence and/or those of successive evocations appeared alternately.

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