Abstract
An electrophysiological study was made on the change of heart rate in rabbits which were experimentally kindled either in amygdaloid nucleus, hippocampus, septal nucleus or cerebral cortex. The results obtained were as follows.(1) After each stimulation, heart r ate decreased in every kindled group. The decrease of heart rate was most clearly seen in the amygdaloid nucleus-kindled group, followed by the hippocampus-, the cerebral cortex- and the septal nucleus-kindled group in that order.(2) Heart rate between stimulations remained unchanged in the amygdaloid- an d the septal nucleus-kindled group, while it increased in the hippocampus-kindled group. Namely, there was observed permanent change of the heart rate in the hippocampus- and cerebral cortexkindled groups.(3) B ased on the above results, it can be concluded that kindling phenomena produce permanent changes on the autonomic nervous system and the cardiac function as well. Accordingly, kindling phenomena are suggested to be eligible for an experimental model for cardiovascular symptoms caused by imbalance of the autonomic nervous system.
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