Dawn simulation light impacts on different cognitive domains under sleep restriction.

摘要: Chronic sleep restriction (SR) has deleterious effects on cognitive performance that can be counteracted by light exposure. However, it is still unknown if naturalistic settings (dawn simulating light) enhance daytime in a sustainable matter. Seventeen participants were enrolled 24-h balanced cross-over study, subsequent to SR (6-h of sleep). Two different administered each morning: a) dawn (DsL; polychromatic gradually increasing from 0 250 lx during 30 min before wake-up time, with around for 20 after time) and b) control dim (DL; <8 lx). Cognitive tests performed every 2 h scheduled wakefulness questionnaires completed hourly assess subjective mood. The analyses yielded main effect "light condition" the motor tracking task, sustained attention response task working memory (visual 1 3-back task), as well Simple Reaction Time Task, such showed better throughout day morning DsL exposure compared DL. Furthermore, low performers benefited more high performers. Conversely, no significant influences found Psychomotor Vigilance Task contrary was observed digit symbol substitution test. No perception sleepiness, mental effort, concentration motivation. Our data indicate short artificial may significantly domain-specific manner under conditions mild SR.