Continuum of Dreaming during Transition between Sleep Stages 2 and 3: Testing the Paradigm of Repetitive Awakenings

Document Type: 
ASSC Conference Item
Article Type: 
Dreaming, dreamless sleep, sleep onset NREM, sleep onset REM, repetitive awakenings, methodology
Deposited by: 
Mr Valdas Noreika
Date of Issue: 
Valdas Noreika, Katja Valli, Hetti Lahtela, Antti Revonsuo
Event Dates: 
23-26 Jun 2006
Event Location: 
Oxford, UK
Event Title: 
10th annual meeting of the Association for the Scientific Study of Consciousness
Event Type: 
ASSC Conference
Presentation Type: 
Number of Pages: 
Dissociation between dreaming and dreamless sleep could be applied in the search for the neural correlates of consciousness; however, there are some methodological difficulties in this. The usual method, i.e. comparing dreaming versus dreamless sleep obtained from different stages of sleep, is confounded. Ambiguities remain if the suggested correlate is associated with dreaming as such or simply with a certain stage of sleep. Another more practical but equally limiting problem is inefficient utilisation of laboratory time. Repetitive awakenings performed during single experimental nights and timed to take place during Stage 3 of NREM sleep, might be a useful paradigm to avoid the above difficulties. Awakenings from Stage 3 provide reports of dreamless sleep and dreams in almost equal proportions. In laboratory, at least five reliable reports can be gathered during the first three hours of EEG recording, before the dream recall significantly decreases.
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