Strategies to Limit Cognitive Impairments under Sleep Restriction: Relationship to Stress Biomarkers. 2022

Danielle Gomez-Merino, and Catherine Drogou, and Eden Debellemaniere, and Mégane Erblang, and Rodolphe Dorey, and Mathias Guillard, and Pascal Van Beers, and Melanie Thouard, and Robin Masson, and Fabien Sauvet, and Damien Leger, and Clément Bougard, and Pierrick J Arnal, and Arnaud Rabat, and Mounir Chennaoui
Unité Fatigue et Vigilance, Institut de Recherche Biomédicale des Armées (IRBA), 91223 Bretigny-sur-Orge, France.

Adding relaxation techniques during nap or auditory stimulation of EEG slow oscillation (SO) during nighttime sleep may limit cognitive impairments in sleep-deprived subjects, potentially through alleviating stress-releasing effects. We compared daytime sleepiness, cognitive performances, and salivary stress biomarker responses in 11 volunteers (aged 18-36) who underwent 5 days of sleep restriction (SR, 3 h per night, with 30 min of daily nap) under three successive conditions: control (SR-CT), relaxation techniques added to daily nap (SR-RT), and auditory stimulation of sleep slow oscillations (SO) during nighttime sleep (SR-NS). Test evaluation was performed at baseline (BASE), the fifth day of chronic SR (SR5), and the third and fifth days after sleep recovery (REC3, REC5, respectively). At SR5, less degradation was observed for percentage of commission errors in the executive Go-noGo inhibition task in SR-RT condition compared to SR-CT, and for sleepiness score in SR-NS condition compared both to SR-CT and SR-RT. Beneficial effects of SR-RT and SR-NS were additionally observed on these two parameters and on salivary α-amylase (sAA) at REC3 and REC5. Adding relaxation techniques to naps may help performance in inhibition response, and adding nocturnal auditory stimulation of SO sleep may benefit daytime sleepiness during sleep restriction with persistent effects during recovery. The two strategies activated the autonomic nervous system, as shown by the sAA response.

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