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On the basis of 500 epileptic patients treated in the Out-Patient Department of the "Instituto de Neurología", Hospital de Clínicas, Montevideo, Uruguay, an epidemiological study is undertaken. Data obtained correspond to the period extending between 1965 and 1975. A precodified data registering system was used and the analysis was done by mechanical processes. It is mainly a descriptive analysis of the group of patients and their seizures, including 20 items. As far as social aspects are concerned, education levels and occupation are analyzed, encountering similar levels as those of the general population in this country. As to etiological factors, a high incidence of familiar history of epilepsy (17%) and of perinatal pathology (19%) is found. An analytical study of the seizures and their provoking factors is performed. Etiological factors are analyzed dividing the patients in two groups according to the age of beginning of seizures (before or after 25 years) and in the younger groups perinatal factors and epilepsy of unknown origin predominate, while in the older group vascular and tumoral causes are more frequent.

An epidemiology analysis is carried out in a hospital population of 500 epileptic patients older than 14 years of age, pertaining to the outpatient department of the Instituto de Neurología, Hospital de Clínicas, Monevideo". This information gathered, corresponds to the period, 1966-1975. Specially formulated records of precoded-type data were used for this research and the data was processed by automation. This work deals fundamentally with a descriptive study in which the character of the population and of its epilepsy is studied by means of 20 items. Analyzed from within the social aspects, the school attendance and the occupation of the patients, amounts, similar to those of the general population of the country, were found. An elevated incidence of family epilepsy antecedents (17%) in the group and also of perinatal pathology (19%), is emphasized. An analytic study of the clinical type of crisis and of the factors unleashed by the attacks is made. Dividing the population into two groups, according to the beginning of epilepsy, before or after the 25 years, the different etiology for both groups is specially pointed out, the juvenile epilepsy predominating in the unknown etiology, genetics and that which is produced by perinatal pathology, while in the tary epilepsy, the vascular and tumoral etiology, above all, is most frequent.

During the period 1960 to 1976 170 cases of myasthenia were analyzed in the Laboratorio de Afecciones Neuromusculares del Instituto de Neurologia de Montevideo. This is an epiderom the total), pregnancy, surgical treatment (Thymectomy, 6%), lethally (13%). It is concluded that myasthenia is an unfrequent disease, with female prevalence (58%); between 30 to 70 years, starting by oculomotor signs (74%) and of severe prognosis in 24% of cases.