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Cortical reactivity and effective connectivity during REM sleep in humans

Cortical reactivity and effective connectivity during REM sleep in humans We recorded the electroencephalographic (EEG) responses evoked by transcranial magnetic stimulation (TMS) during the first rapid eye movement (REM) sleep episode of the night and compared them with the responses obtained during previous wakefulness and non-REM (NREM) sleep. Confirming previous findings, upon falling into NREM sleep, cortical activations became more local and stereotypical, indicating a significant impairment of the intracortical dialogue. During REM sleep, a state in which subjects regain consciousness but are almost paralyzed, TMS triggered more widespread and differentiated patterns of cortical activation that were similar to the ones observed in wakefulness. Similarly, TMS/high-density EEG may be used to probe the internal dialogue of the thalamocortical system in brain-injured patients that are unable to move and communicate. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Cognitive Neuroscience Taylor & Francis

Cortical reactivity and effective connectivity during REM sleep in humans

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References (31)

Publisher
Taylor & Francis
Copyright
Copyright 2010 Psychology Press, an imprint of the Taylor & Francis Group, an Informa business
ISSN
1758-8936
eISSN
1758-8928
DOI
10.1080/17588921003731578
Publisher site
See Article on Publisher Site

Abstract

We recorded the electroencephalographic (EEG) responses evoked by transcranial magnetic stimulation (TMS) during the first rapid eye movement (REM) sleep episode of the night and compared them with the responses obtained during previous wakefulness and non-REM (NREM) sleep. Confirming previous findings, upon falling into NREM sleep, cortical activations became more local and stereotypical, indicating a significant impairment of the intracortical dialogue. During REM sleep, a state in which subjects regain consciousness but are almost paralyzed, TMS triggered more widespread and differentiated patterns of cortical activation that were similar to the ones observed in wakefulness. Similarly, TMS/high-density EEG may be used to probe the internal dialogue of the thalamocortical system in brain-injured patients that are unable to move and communicate.

Journal

Cognitive NeuroscienceTaylor & Francis

Published: Aug 18, 2010

Keywords: Consciousness; Sleep; Dream; Transcranial magnetic stimulation; EEG

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