EEG studies on hyperthyroidism and hypothyroidism before and after clinical therapy
Nevsimal, O.; Roth, B.; Smejkal, V.; Soumar, J.
Ceskoslovenska Neurologie 25: 243-247
1962
ISSN/ISBN: 0009-0581 PMID: 14479295 Document Number: 8754
A. Hyperthyreosis: 20 patients suffering from hyperthyreosis have been examined. The most prominent feature of the tracings was a fast activity of 18-25 c./sec. of medium to high voltage. It was found in 17 cases. The alpha rhythm had in most cases a frequency of 11 -13 c./sec.; often its shape was somewhat sharper. In 13 cases it was poorly pronounced and in one case it was entirely absent. Slow waves of the theta band were found in 15 cases. Only in a minority of these cases episodes of theta waves were present. In four tracings sharp waves have been found. Hyperventilation provoked abnormal EEG features in about a half of all cases. An EEG examination was performed in 11 of these patients after treatment. In 6 cases a complete normalisation of the tracings has been found, whereas 4 cases showed only incomplete improvement. This manifested itself by a decrease or complete disappearing of the pathological slow wave as well as fast wave activity. B. Hypothyreosis: 15 patients with hypothyreosis have been studied. The tracings were normal in 8 cases, whereas in 7 cases a slight to moderate abnormality was observed. The alpha rhythm was rather slower (8% -10 c./sec.), its amplitude was low. In 15 cases scattered theta waves were present. Drowsy rhythms were noted in 5 tracings. After treatment the frequency of the alpha rhythm increased in most cases, as well as its amplitude. It seems to be evident that EEG is a valuable aid in assessing the diagnosis and prognosis of thyreopathies as well as in controlling the results of the treatment.
Document emailed within 1 workday
