Electrical Activity of the Brain following Cerebral Micro‐infusion of Cortisol
- 1 September 1971
- Vol. 12 (3) , 249-262
- https://doi.org/10.1111/j.1528-1157.1971.tb04932.x
Abstract
SUMMARY: The effects of simultaneous micro‐infusion of 1.5 mg Cortisol into different subcortical structures on the electrical activity of the hippocampus, amygdala, various hypothalamic regions, the midbrain reticular formation and cortex was studied. Three infusions of the hormone were given at 30‐min intervals and all records were analyzed for the appearance of initial as well as subsequent epileptic phenomena, either in the form of isolated high‐voltage spikes or continuous epileptic discharges.Based on the predominance of the total number of initial epileptic discharges in the various brain areas studied, the hippocampus was found to be most susceptible to the hormone, the posterior hypothalamus and midbrain reticular formation had a somewhat higher convulsive threshold, while the anterior hypothalamus showed the smallest number of initial epileptic phenomena following Cortisol infusion. The significance of these findings in relation to the effects of adrenocortical hormones on the brain are discussed.RESUME: On a étudié les effets d'une micro‐perfusion simultanée de 1.5 mg de cortisone sur l'activitéélectrique des différentes structures sub‐corticales, telles que l'hyppo‐campe, l'amygdala, différentes régions hypothalamiques, la formation réticulée mesencéphalique et le cortex.On a fait trois infusions de l'hormone à 30 minutes d'intervalle et dans tous les tracés on a étudié le début et le développement des décharges épileptiques continues.En se basant sur le nombre total des décharges épileptiques initiales dans les différentes structures étudiées, on a trouvé que l'hyppocampe était le plus sensible à faction de l'hormone, que l'hypothalamus postérieur et la formation réticulée mesencéphalique avaient un seuil convulsif un peu plus élevé, tandis que l'hypothalamus antérieur présentait le nombre le plus réduit des décharges épileptiques initiales aprés infusion de cortisone.La signification de ces données a été discutée en relation avec les effets des hormones adréno‐corticales sur le cerveau.Keywords
This publication has 14 references indexed in Scilit:
- Changes in single cell responsiveness in the hypothalamus in cats following cortisol administrationBrain Research, 1970
- Differential sensitivity of various brain structures to the epileptogenic action of penicillinExperimental Neurology, 1966
- Convulsive Phenomena produced by Intraventricular Administration of Hydrocortisone in CatsEpilepsia, 1966
- EFFECTS OF REICHSTEIN'S COMPOUND S, STRYCHNINE AND LEPTAZOL PERFUSED THROUGH CEREBRAL VENTRICLES OF CATSBritish Journal of Pharmacology and Chemotherapy, 1966
- Effect of hydrocortisone on electrical activity, arousal thresholds and evoked potentials in the brains of chronically implanted rabbitsJournal of the Neurological Sciences, 1966
- Production of convulsions in the dog with intrathecal corticosteroidsNeurology, 1961
- Effect of adrenocortical hormones on evoked potentials in the brain stemNeurology, 1961
- STUDIES OF CEREBROSPINAL FLUID FOLLOWING ORAL ADMINISTRATION OF CORTISONE ACETATE OR HYDROCORTISONEJournal of Endocrinology, 1955
- HIPPOCAMPAL SEIZURES AND THEIR PROPAGATIONArchives of Neurology & Psychiatry, 1953
- On the Effect of Cortisone on the ElectroencephalogramStereotactic and Functional Neurosurgery, 1953