Sleep spindle and psychopathology characteristics of frequent nightmare recallers

Sleep Medicine
Claudia Picard-DelandTore Nielsen

Abstract

Idiopathic nightmares are a common disturbance of rapid eye movement sleep (REM) sleep, but studies of comorbid pathologies and sleep architecture suggest that non-REM (NREM) sleep is also affected. Sleep spindles are a NREM sleep characteristic associated with both pathophysiology and sleep-dependent memory consolidation, yet they have not been evaluated in frequent nightmare recallers. The morning naps of 38 participants with frequent idiopathic nightmares (mean age: 23.7 ± 3.78 years) and 25 age- and sex-matched controls (23.9 ± 3.65 years) were recorded and their sleep evaluated. A custom spindle detector assessed NREM sleep stage 2 (N2) sleep spindles on six electroencephalogram (EEG) derivations (F3, F4, C3, C4, O1, and O2) for density (number spindles/N2 time), mean frequency, and amplitude. Total spindles (10-16 Hertz (Hz) range), slow spindles (10-12.79 Hz), and fast spindles (12.8-16 Hz) were all assessed separately. Compared with the Control group, the Nightmare group had longer N2 sleep latency and a marginally greater %N2 sleep. The Nightmare group also had a lower than normal density of slow spindles in most EEG derivations, a higher density of fast spindles in frontal derivations, and an elevated fast spindle osc...Continue Reading

Citations

Dec 21, 2018·Frontiers in Neuroscience·Stefan Stieger, Tim Kuhlmann
Jun 23, 2020·Sleep Medicine·Philip M Becker
May 21, 2021·Neurobiology of Learning and Memory·Claudia Picard-DelandTore Nielsen
Aug 1, 2021·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·Gülçin Benbir ŞenelDerya Karadeniz

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