This paper contains a clinical, classical electroencephalographic and computerized electroencephalographic (by original methods) study of 271 cases with vertebro-basilar strokes, all the cases being verified by transcranial Doppler ultrasound investigations and some of the patients by morphopathological studies. In the first part, the standard EEG modifications in relation with the clinical pictures and with the affected arterial field are presented. In the second part, the aspects of the computerized EEG recordings with the carrying out of the cortical EEG mappings which have brought important contributions in setting down the topography of the infarctions are discussed. The third part presents the results of the polysomnographic recordings of the 70 selected cases with ischaemic vertebro-basilar attacks without disorders of consciousness (32 cases), with attacks accompanied by symptomatic hypersomnias (13 cases), with ischaemic attacks accompanied by insomnia (5 cases) and with ischaemic attacks with disorders of consciousness (20 cases). The opinion of the authors on the possible relations between the disturbances of the vigilance, the perturbations of the polysomnographic organization of sleep-wakefulness cycles (with the realisation of some interesting competitive dysfunctions between the three states of vigilance) and the electrographic anomalies are discussed.

Adult↗

PubMedDate not supplied

Clinical, polysomnographic and computerized electroencephalographic research in temporal lobe epilepsies.

The present study has selected 125 cases with psychomotor attacks (sometimes secondarily generalized). Polysomnographic recordings were carried out for a continuous period of eight hours. All this time, the patients have been observed by video-monitorization on a closed infrared circuit screen. The diagnostic procedure was supported by several computerized EEG mappings (CEM) according to a model achieved by us, transcribing the primary data which were obtained by Hjorth's NSD parameters (activity and ability) from the Siemens-Elema Mingograph to a microcomputer. In many cases, we have employed an interface which had been envisaged by us for analog-digital conversion of amplitudes and frequencies from the Mingograph to the microcomputer. Sleep organization anomalies were found: increase of the percentages of light slow-wave sleep (LSWS) and of REM sleep and reduction of the percentages of deep slow-wave sleep (DSWS). The temporal foci appeared with the greatest frequency and with a clear-cut evidence during LSWS, especially in REM sleep and in the transitional states of SWS to REM sleep and from REM sleep to wakefulness. Our researches supplemented with CEM, demonstrate a peculiar activation of the temporal foci during REM sleep, during the states of LSWS and during the transitional states, showing that many psychomotor attacks appear predominantly during these sleep states and that many cases initially clinically misinterpreted as grand mal seizures are, in fact, focal temporal epilepsies secondarily generalized.

Adolescent↗

PubMedDate not supplied

Polysomnographic and computerized electroencephalographic studies in myoclonic petit mal epilepsies.

The study included 203 epileptic absences: 1. Simple; (30 cases); 2. Myoclonic petit mal absences (62 cases); 3. Amyotonic-akinetic absences (41 cases); 4. Temporal lobe absences (62 cases); 5. "Hybrid" absences in Lennox-Gastaud disease (13 children). This paper presents only the myoclonic petit mal absences (57 cases). Correlations of the clinical, EEG and polysomnographic data were found by several methods: a. The patients were video-monitored on an infrared closed-circuit TV screen: b. The Hjorth's NSD parameters were computed on a Siemens-Elema Mingograph; c. The EEG graphoelements were morphologically analyzed every second throughout the discharges, by means of an original technique; d. Computerized EEG mappings (CEM) were performed for various periods, also including the sequential ones, second by second, all along the epileptic discharges; e. 8 hours of continuous polysomnographic recordings. The peculiar electroclinical features of the five types of absences have been emphasized. Regarding the myoclonic petit mal absences, the discharges of polyspikes and waves manifested an evident increase in the number and duration within the LSWS stages and during the transition from the wakefulness state to sleep and from the LSWS to the wakefulness, and a transformation in slow polyspikes and waves complexes during the stages III and IV. The CEM were always asymmetrical during sleep and the maximal amplitudes were seen on the anterior and posterior temporal regions. In all the REM stages, the polyspikes and waves disappeared.

Adolescent↗

PubMedDate not supplied

[Analysis of the evolution of morbidity caused by viral hepatitis in the S.R. of Rumania using a mathematical model].

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Adolescent↗