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Slow Wave Sleep Mentation: A Comparison
Between the First and the Second Sleep Cycle
Vincenzo Natale, Ph.D.
The aim of the present work was to compare the features of Slow Wave Sleep (SWS) men-tation
during the first and the second sleep cycle. One hundred-two dream reports (66
SWS reports of the first cycle and 36 SWS reports of the second cycle) were obtained
from the Dream Data Bank of the Sleep and Dream Laboratory of the Bologna University
Department of Psychology. The dream reports were analysed for structure (number of
temporal units, number of report multi-units, and narrative continuity), and content (self,
double self, setting, laboratory references, number of non-self characters, dimensional
distortion, space-time distortion, plausibility, body feelings, emotions, reality testing). On
the whole the results showed no significant differences between Slow Wave Sleep dre-ams
of the first and of the second sleep cycle. The SWS mentation in the second cycle
is not influenced by the previous REM period. Data are discussed in relation to the pre-sent
cognitive models on dream production. (Sleep and Hypnosis 2000;2:84-89)
Keywords: dreaming, sleep mentation, slow wave sleep, sleep cycle,
sleep psychophysiology, cognitive system |
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