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date: 13 November 2019

Abstract and Keywords

Humans have been aware for thousands of years that sleep comes in many forms, accompanied by different kinds of mental content. This chapter reviews the first-person report literature on the frequency and type of content experienced in various stages of sleep, showing that different sleep stages are dissociable at the subjective level. It then relates these subjective differences to the growing literature differentiating the various sleep stages at the neurophysiological level, including evidence from electrophysiology, neurochemistry, and functional neuroimaging. The authors suggest that there is emerging evidence for relationships between sleep stage, neurophysiological activity, and subjective experiences. Specifically, they emphasize that functional neuroimaging work suggests a parallel between activation and deactivation of default network and visual network brain areas and the varying frequency and intensity of imagery and dream mentation across sleep stages; additionally, frontoparietal control network activity across sleep stages may parallel levels of cognitive control and meta-awareness.

Keywords: sleep, dream, default network, frontoparietal control network, neurophysiology, electrophysiology, neurochemistry, neuroimaging

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