To examine whether acute changes in cognitive empathy might mediate the impact of light therapy on mood, we assessed the effects of a single light-therapy session on mood and cognitive empathy in 48 premenstrual women, including 17 who met Premenstrual Symptoms Screening Tool criteria for moderate-to-severe premenstrual syndrome / premenstrual dysphoric disorder (PMS/PMDD). Using a…
Marijke Gordijn is co-author of a study that investigates how ambulatory measurements can help in estimating the phase and period of the human circadian clock. Light is the most potent time cue that synchronizes (entrains) the circadian pacemaker to the 24-h solar cycle. This entrainment process is an interplay between an individual’s daily light perception…
Marijke Gordijn is coauthor of a study investigating sleep disturbances in PKU. Sleep problems have not been directly reported in phenylketonuria (PKU). In PKU, the metabolic pathway of phenylalanine is disrupted, which, among others, causes deficits in the neurotransmitters and sleep modulators dopamine, norepinephrine, and serotonin. Understanding sleep problems in PKU patients may help explain…
What is sleep? Sleep as part of our daily life, This chapter describes the basic principles of sleep and wake regulation, the effects of sleep deprivation due to a mismatch between sleep and the biological clock, and what you can do about it. Every evening, a large behavioral change occurs in almost all people. In…
The Award recognizes the paper published in Ergonomics during the preceding year that best contributes to the advancement of ergonomics. You can find our paper, listed for the Liberty Mutual award, entitled Sleep and need for recovery in shift workers: do chronotype and age matter? at http://dx.doi.org/10.1080/00140139.2015.1058426
