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Validation of RBDtector: An Open-Source Automated Software for Scoring REM Sleep Without Atonia.
J Sleep Res
March 2025
Centre of Neurology, Department of Parkinson, Sleep and Movement Disorders, University Hospital Bonn, Bonn, Germany.
Accurate quantification of REM sleep without atonia (RSWA) is essential in the diagnosis of idiopathic/isolated REM sleep behaviour disorder (iRBD). This study aims to validate RBDtector, a free and open-source tool for automated RSWA quantification using the Sleep Innsbruck Barcelona (SINBAR) scoring method, by comparing its performance against human visual scoring in a large independent cohort of subjects with iRBD and healthy controls. Muscle activity from 118 iRBD participants and 37 healthy controls that underwent polysomnography was analysed by RBDtector and compared with human visual scoring.
View Article and Find Full Text PDFHypnogram and Hypnodensity Analysis of REM Sleep Behaviour Disorder Using Both EEG and HRV-Based Sleep Staging Models.
J Sleep Res
March 2025
Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands.
Rapid-eye-movement (REM) sleep behaviour disorder (RBD) is a primary sleep disorder strongly associated with Parkinson's disease. Assessing sleep structure in RBD is important for understanding the underlying pathophysiology and developing diagnostic methods. However, the performance of automated sleep stage classification (ASSC) models is considered suboptimal in RBD, for both models utilising neurological signals ("ExG": EEG, EOG, and chin EMG) and heart rate variability combined with body movements (HRVm).
View Article and Find Full Text PDFMulti-region processing during sleep for memory and cognition.
Proc Jpn Acad Ser B Phys Biol Sci
March 2025
Laboratory for Sleeping-Brain Dynamics, Research Center for Idling Brain Science, University of Toyama, Toyama, Japan.
Over the past decades, the understanding of sleep has evolved to be a fundamental physiological mechanism integral to the processing of different types of memory rather than just being a passive brain state. The cyclic sleep substates, namely, rapid eye movement (REM) sleep and non-REM (NREM) sleep, exhibit distinct yet complementary oscillatory patterns that form inter-regional networks between different brain regions crucial to learning, memory consolidation, and memory retrieval. Technical advancements in imaging and manipulation approaches have provided deeper understanding of memory formation processes on multi-scales including brain-wide, synaptic, and molecular levels.
View Article and Find Full Text PDFREM sleep quality is associated with balanced tonic activity of the locus coeruleus during wakefulness.
J Biomed Sci
March 2025
GIGA-Institute, CRC-Human Imaging, University of Liège, Bâtiment B30, 8 Allée du Six Août, Sart Tilman, 4000, Liège, Belgium.
Background: Animal studies established that the locus coeruleus (LC) plays important roles in sleep and wakefulness regulation. Whether it contributes to sleep variability in humans is not yet established. Here, we investigated if the in vivo activity of the LC is related to the variability in the quality of Rapid Eye Movement (REM) sleep.
View Article and Find Full Text PDFVagal heart rate variability during rapid eye movement sleep reduces negative memory bias.
Front Behav Neurosci
February 2025
Department of Cognitive Science, University of California, Irvine, CA, United States.
Emotional memories change over time, but the mechanisms supporting this change are not well understood. Sleep has been identified as one mechanism that supports memory consolidation, with sleep selectively benefitting negative emotional consolidation at the expense of neutral memories, with specific oscillatory events linked to this process. In contrast, the consolidation of neutral and positive memories, compared to negative memories, has been associated with increased vagally mediated heart rate variability (HRV) during wakefulness.
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