Contribution of brainstem circuits in pathophysiology of NREM-sleep parasomnias

•There is a trend for enhanced ASR in NREM-sleep parasomnia.•There is small evidence regarding early facilitation of BR recovery.•R2-PPI in NREM-sleep parasomnia was comparable to that in healthy subjects. We aimed to investigate the brainstem circuits to reveal if there was any abnormality in these...

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Veröffentlicht in:Neuroscience letters 2021-08, Vol.760, p.136075-136075, Article 136075
Hauptverfasser: Ertaş, F. İnci, Aygun, Demet, Benbir Senel, Gülçin, Gündüz, Ayşegül, Karadeniz, Derya, E. Kızıltan, Meral
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Sprache:eng
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Zusammenfassung:•There is a trend for enhanced ASR in NREM-sleep parasomnia.•There is small evidence regarding early facilitation of BR recovery.•R2-PPI in NREM-sleep parasomnia was comparable to that in healthy subjects. We aimed to investigate the brainstem circuits to reveal if there was any abnormality in these circuits in clinically diagnosed patients with NREM parasomnias during wakefulness. Twelve patients with NREM-sleep parasomnia diagnosed according to ICSD-3 criteria and a control group of 16 healthy subjects were enrolled into our study. We analyzed the auditory startle reflex (ASR), blink reflex (BR), prepulse inhibition (PPI) of BR and recovery excitability of BR. There was a trend for longer responses from orbicularis oculi and sternocleidomastoid muscles after auditory stimulation in the patients compared to those in the healthy subjects. The recovery percentages at 200 ms and 300 ms showed a borderline significance in the patients. No significant difference was found in the R2-PPI between the patients and healthy subjects. Our results suggest a mildly enhanced ASR and relatively early facilitation of BR excitability in patients with NREM-sleep parasomnia during daytime. Although our findings suggest involvement of brainstem networks in NREM-sleep parasomnia during wakefulness, it would be better to study these networks at night and during daytime to see if there is any contribution.
ISSN:0304-3940
1872-7972
DOI:10.1016/j.neulet.2021.136075