[Evaluation of the EEG aspects of rheumatic chorea as related to the clinico-evolutive parameters of the disease].

E.E.G. features as presented by 20 patients of rheumatic chorea (15 females and 6 males, from 11 and up to 16 year old) are examined. Pathological patterns concerned 17 patients (85%); in three cases (15%) no characteristic E.E.G. enregistrations were found. Three types of pathological E.E.G. patterns are reckoned: A type (7 patients, i.e. 35%): increased amount of Posterior Slow Waves. B type (5 patients, i.e. 25%): conspicuous alterations of the alpha rhythm, and appearance of bursts of diffused, monomorphous, slow activities. C type (5 patients, i.e. 25%): inconstant outcoming by bursts, of 2--4 cycles sec. waves on posterior regions. No correlation can be established, on the ground both of E.E.G. features and clinical findings, neither between altered E.E.G. patterns and choreic movements severity, nor between localization of the former abnormalities over the scalp, and distribution of the latter. Yet, E.E.G. alterations, when present, are not to be ruled out, as they can be the demonstration of organical impairment and can give evidence about the course and recovering. To distinguish, in rheumatic chorea between clearly pathological, by the one hand, and "functional" by the other, E.E.G. features, is assumed as difficult, as subjects are in a range of ages in which cerebral biorhythms have not reached ultimate definition.