Changes in the number of EEG-paroxysms, and in the ongoing and instant frequencies of neurones from one population under the effect of a series of interoceptive stimuli.
The changes in the number of EEG-paroxysms and in the average ongoing and instant frequencies of the neuronal discharges from one population (GS or VPL) under the effect of series of mechanoreceptor stimulations of the stomach, are studied simultaneously in acute experiments on cats. The application of a large number of interoceptive stimuli is found to increase the after-effect and the cumulative effect at macro- and micro-levels. The changes in the ongoing and instant frequencies, accompanying the rise in number of the EEG-paroeysms suggest increased excitation of the neurones under the effect of the interoceptive stimulations. No qualitative changes characteristic of the pathologic epileptic neurones are observed. The result obtained give evidence that the paroxysms formed under the effect of adequate interoceptive stimuli, are a manifestation of changes in the excitability of the nervous system, which do not exceed the limits of pysiological homeostasis.
D000818:Animals; D001921:Brain / Q000166:cytology / Q000502:physiology*; D002415:Cats; D004558:Electric Stimulation; D004569:Electroencephalography; D004827:Epilepsy / Q000503:physiopathology; D008465:Mechanoreceptors / Q000502:physiology; D009474:Neurons / Q000502:physiology*