[Dynamics of the bioelectric activity of the brain in patients with primary hyperparathyroidism treated surgically].

The clinico-electroencephalographic examination over time of 23 patients with primary hyperparathyrosis using the automated assessment of the EEG findings showed that the disease was characterized by unmarked inconclusive changes in the cerebral rhythm, the degree of these changes showing no dependence on the level of blood calcium. Six to seven days after surgery for removing the adenoma of the parathyroid gland, the EEG disorders either increased or remained unaltered; they exhibited no correlation with the post-surgical normo- or hypocalcemia. Stable normalization of the clinico-neurological and EEG parameters was observed at a later post-surgical period, varying from 6 to 12 months.