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In this study cyclic changes of human sleep structure were examined. For whole-night polysomnograms of 35 healthy volunteers of both sexes, manual hypnograms were created and divided into NREM-REM cycles. EEG signals from C3-A2 derivation were analysed by computer using a Fast Fourier Transform (FFT). For consecutive NREM-REM cycles of individual sleep(More)
S u m m a r y Chronotype is an attribute connected with an individual, preferred pattern of circadian activity on the continuum of morningness-eveningness. It mirrors the inter-individual differences in the course of circadian rhythms [1, 2]. The studies indicate its connections with sleep-wake cycle, i.e.: time of sleep onset, wake up time and duration of(More)
UNLABELLED Major depression, seasonal pattern (seasonal affective disorder SAD) characterize the winter recurrence depressive episodes with remission of symptoms in spring and summer. Patients with winter depression report hypersomnia, fatigue, loss of energy, carbohydrate craving, appetite and weight gain. AIM The aim of this study was to assess the(More)
The modified Color Density Spectral Array (CDSA) method used for graphical representation of sleep patterns is described in this article. CDSA was presented for the first time in 1987 by M. Salinsky and coauthors. This method was adapted to display frequency course and voltage of EEG signal during sleep. The overnight sleep records of 35 healthy volunteers(More)
The effect of zolpidem on the brain bioelectric activity in falling asleep process of 13 healthy volunteers (8 women, 5 men), aged 20-24 years, was investigated. Its effect on sleep latency was studied. Quantitative analysis of sleep spindles occurrence was realized. It caused significant increase of sleep spindles activity in the first hour after its(More)
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