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Chapter 12 - Neuroimaging of phasic and non-phasic NREM activities

from Section 2 - Neuroimaging of wakefulness and sleep

Published online by Cambridge University Press:  05 March 2013

By
Thien Thanh Dang-Vu
Edited by
Eric Nofzinger ,
Pierre Maquet  and
Michael J. Thorpy
Eric Nofzinger
Affiliation:
University of Pittsburgh
Pierre Maquet
Affiliation:
Université de Liège, Belgium
Michael J. Thorpy
Affiliation:
Sleep-Wake Disorders Center, Montefiore Medical Center, New York
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Summary

This chapter reviews the functional brain imaging studies, using positron emission tomography (PET) and functional magnetic resonance imaging (fMRI), that have examined neural activity patterns between non-rapid eye movement (NREM) sleep and wakefulness, and within NREM sleep in association with phasic neuronal oscillations. It explores recent fMRI data investigating the relationship between these rhythms and the processing of external stimulation during sleep. In order to further explore this relationship between external stimulation and NREM sleep phasic activity, brain responses to pure tones delivered during NREM sleep were evaluated in a recent event-related fMRI study. In the fMRI study, the relationship between auditory stimulation and slow waves was also explored. It is well known that external stimulation during NREM sleep can trigger a slow wave on electroencephalographic (EEG) recordings: such evoked slow waves, especially during stage N2, are also termed K-complexes.

Keywords

magnetic resonance spectroscopymetabolismfunctional MRIbrain functiondiffusion tensor imaging
Type
Chapter
Information
Neuroimaging of Sleep and Sleep Disorders , pp. 96 - 104
Publisher: Cambridge University Press
Print publication year: 2013

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