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By polygraphic methods the authors studied the sleep patterns during treatment of patients with subtentorial tumours causing hydrocephalus. Sleep recording was carried out in three stages of treatment: 1) before insertion of ventriculo-atrial valve, (7 investigations), 2) on the 7th day after valve insertion (7 investigations), 3) two months after removal(More)
The purpose of the study was to establish the influence exerted by a supratentorial brain tumour on the EEG correlates of sleep, and to compare the results before and after operation. Five patients were studied (aged 38 to 59 years) who were treated surgically for supratentorial expanding lesions: two cases of meningioma (in left parietal area), two cases(More)
Earlier investigations of Baekeland et al. (1968) showed that stress conditions change the characteristic features of sleep. It was the aim of this work to compare the effect of pre-examination stress and preoperative stress on the characteristic features of sleep. Three groups of 5 individuals each were studied: students, patients and controls aged from 20(More)