Local Aspects of Sleep and Wakefulness

About this Research Topic

Background

It is now well established that sleep and wakefulness are locally regulated. In fact, typical sleep hallmarks, such as slow waves and spindles, display a clear regional modulation based on maturational and experience-dependent brain plasticity. Of note, these regional changes have been suggested to reflect the off-line processing and transformation of wake-dependent brain modifications, in line with a direct involvement of sleep in learning and memory consolidation. In addition, recent work showed that islands of wakefulness and sleep may often coexist in the same individual. Indeed, the incidence of local sleep-like episodes during wakefulness increases following sleep restriction or deprivation, but also as a consequence of the reiterated or extended ‘use’ of task-related brain areas. Such sleep-like activity seems to represent an index of ‘functional fatigue’ and may have a significant impact on behavior and cognition. On the other hand, local wake-like activity may occur during sleep and has been suggested to be involved in the generation and characterization of dream experiences. Finally, alterations in the balance between local aspects of sleep and wakefulness may contribute to explain symptoms commonly attributed to many sleep disorders, such as insomnia or sleepwalking. However, preliminary evidence has also pointed to their potential involvement in neurological (e.g., stroke) and psychiatric (e.g., major depression) pathological conditions.

The present Research Topic aims to collect original research articles, reviews and perspective articles related to the investigation and characterization of local aspects of sleep and wakefulness. Covered topics include: functional and biological mechanisms underlying the local regulation of sleep and wakefulness; implications of local sleep-like activity for brain functioning and behavior during wakefulness; involvement of local sleep regulation in memory consolidation, emotional regulation, and other potential sleep-related functions; implications of local sleep regulation for the phenomenology and neurophysiology of dreaming; possible involvement of an altered local sleep regulation in pathological conditions; novel methodological approaches for the identification and characterization of co-occurring patterns of sleep and wakefulness.

Keywords: local sleep, local wakefulness, homeostasis, plasticity, dreaming

Important note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

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