Previous work from our laboratory has shown that a measure of attention to emotionally-charged stimuli, the late positive potential (LPP) event related potential (ERP), distinguished neutral from emotional pictures on a baseline day, but not after sleep deprivation. Here we sought to extend these findings and address the uncertainty about the effect of time-of-day on emotion processing by testi...

OBJECTIVES/HYPOTHESIS A large sector of the population of the United States has sleep deprivation directly leading to excessive daytime sleepiness. The prevalence of excessive daytime sleepiness in this population ranges from 0.3% to 13.3%. The consequences of even 1 to 2 hours of sleep loss nightly may result in decrements in daytime functions resulting in human error, accidents, and catastrop...

STUDY OBJECTIVE To investigate the facial cues by which one recognizes that someone is sleep deprived versus not sleep deprived. DESIGN Experimental laboratory study. SETTING Karolinska Institutet, Stockholm, Sweden. PARTICIPANTS Forty observers (20 women, mean age 25 ± 5 y) rated 20 facial photographs with respect to fatigue, 10 facial cues, and sadness. The stimulus material consisted o...

Abstract Introduction Retired night shift workers report poorer sleep quality compared to retired day workers, even after returning a nocturnal schedule, suggesting potential “scarring” of work on sleep. History deprivation and at an unfavorable circadian phase may compromise homeostatic regulation, potentially contributing poor in workers. This study efficiency regulation response (delta EEG p...

STUDY OBJECTIVES We have previously reported that older (24 mo.) Fischer rats manifest a diminished post-sleep deprivation increase in NREM and REM sleep. In order to examine whether this decline reflects an age-related change in pineal function, we are now reporting on baseline and recovery sleep parameters in pinealectomized 3-, 12-, and 24-month old rats following 24 hours of sleep deprivati...

purpose the aim of this study was to determine the effect of one night's sleep deprivation on anaerobic performance and reaction time of subjects in the morning of the following day. methods eighteen male college student athletes were studied twice in a balanced, randomized design. subjects were measured for peak power, mean power and reaction time. results the performance showed no significant...

STUDY OBJECTIVES Visual short-term memory (VSTM) is an important measure of information processing capacity and supports many higher-order cognitive processes. We examined how sleep deprivation (SD) and maintenance duration interact to influence the number and precision of items in VSTM using an experimental design that limits the contribution of lapses at encoding. DESIGN For each trial, par...

SLEEP AND THE DEPRIVATION OF SLEEP ARE BECOMING IMPORTANT ISSUES IN EVERYDAY LIFE. SLEEP DEPRIVATION HAS CONSEQUENCES FOR PUBLIC safety and health. Some obvious problems concern attention, vigilance, and fatigue,1 but less obvious ones are cardiovascular problems and obesity.2 Sleep deprivation is known to cause molecular, physiological, and behavioral changes. It changes the expression of imme...

We studied the impact of sleep deprivation on action monitoring. Each participant performed a Simon task after a normal night of sleep and after 26 h of awakening. Reaction time (RT) distributions were analyzed and the sensitivity of the error negativity (Ne/Ne like) to response correctness was examined. Results showed that (1) the Simon effect persisted for the longest RTs only after sleep dep...