EFFECTS OF ARTIFICIAL DAWN ON SUBJECTIVE RATINGS OF SLEEP INERTIA AND DIM LIGHT MELATONIN ONSET

摘要: The timing of work and social requirements has a negative impact on performance well-being significant proportion the population in our modern society due to phenomenon known as jetlag. During workdays, early morning, late chronotypes, particular, suffer from combination nonoptimal circadian phase sleep deprivation. Sleep inertia, transient period lowered arousal after awakening, therefore, becomes more severe. In present home study, authors tested whether use an alarm clock with artificial dawn could reduce complaints inertia people having difficulties waking up early. also examined these improvements were accompanied by shift melatonin rhythm. Two studies performed: Study 1: three conditions (0, 50, 250 lux) 2: two (0 lux self-selected dawn-light intensity). Each condition lasted 2 weeks. both studies, resulted reduction complaints. However, no onset was observed weeks using or 50 compared control condition. A multilevel analysis revealed that only presence dawn, rather than dim light offset, is related Mechanisms other rhythms are needed explain positive results signal. (Author correspondence: m.c.gimenez@rug.nl)