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View article: O006 Tracking wake propensity across night shift lighting conditions with ORP
O006 Tracking wake propensity across night shift lighting conditions with ORP Open
Introduction Odds ratio product (ORP) provides a continuous metric of sleep depth and wake propensity that may be a useful marker of sleep and circadian disruption effects on sleepiness and subsequent performance. Thus, the present study e…
View article: 0013 Comparing Sleep Loss and Circadian Effects in Cognitive Performance
0013 Comparing Sleep Loss and Circadian Effects in Cognitive Performance Open
Introduction Extended wakefulness of up to 24 hours has been associated with severe impairments in performance and attention measures. The impairment may not be due solely to sleep loss since some recovery of function occurs the next day e…
View article: Poorer objective but not subjective driving performance in drivers vulnerable to sleep loss effects during extended wake
Poorer objective but not subjective driving performance in drivers vulnerable to sleep loss effects during extended wake Open
Summary Sleepiness‐related errors are a leading cause of driving accidents, requiring drivers to effectively monitor sleepiness levels. However, there are inter‐individual differences in driving performance after sleep loss, with some show…
View article: O012 Do healthy sleepers demonstrate sleep-wake state discrepancy?
O012 Do healthy sleepers demonstrate sleep-wake state discrepancy? Open
Sleep-wake state discrepancy is a common phenomenon for individuals with insomnia, where an individual self-reports worse sleep parameter values than observed in polysomnography-derived values. However, this presumes there is no systematic…
View article: P028 Sleep depth and wake propensity measured with the Odds-Ratio Product (ORP) in a shift work protocol comparing two lighting interventions
P028 Sleep depth and wake propensity measured with the Odds-Ratio Product (ORP) in a shift work protocol comparing two lighting interventions Open
ORP is a continuous metric of sleep depth and wake propensity, which distinguishes different levels of sleep depth within the same conventional sleep stage. Circadian-informed lighting may improve sleep depth compared to regular, dim light…
O058 Sleep estimates from an under-mattress sensor can predict vigilance, working memory, and mental arithmetic performance Open
Introduction Sleep is vitally important to maintain cognitive function. Sleep trackers can reliably estimate several sleep metrics to help predict cognitive performance, but associations between sleep-tracker estimated sleep and cognitive …
O021 Distinguishing Circadian from Sleep Effects on Cognitive Performance During a Simulated Night Work Lighting Intervention Open
Introduction We previously found that a circadian-informed lighting intervention accelerated circadian retiming, improved cognitive performance and sleep during 4-days of simulated nightwork. This study explores the independent and combine…
Circadian-informed lighting improves vigilance, sleep, and subjective sleepiness during simulated night-shift work Open
Study Objectives Shiftwork is associated with cognitive impairment and reduced sleep time and quality, largely due to circadian misalignment. This study tested if circadian-informed lighting could improve cognitive performance and sleep du…
A circadian-informed lighting intervention accelerates circadian adjustment to a night work schedule in a submarine lighting environment Open
Study Objective Night work has detrimental impacts on sleep and performance, primarily due to misalignment between sleep–wake schedules and underlying circadian rhythms. This study tested whether circadian-informed lighting accelerated cir…
Estimating vigilance from the pre‐work shift sleep using an under‐mattress sleep sensor Open
Summary Predicting vigilance impairment in high‐risk shift work occupations is critical to help to reduce workplace errors and accidents. Current methods rely on multi‐night, often manually entered, sleep data. This study developed a machi…
View article: P071 Simple Vestibular-Occular Motor Assessment as a Predictor of Driving Performance Vulnerability following extended Wakefulness
P071 Simple Vestibular-Occular Motor Assessment as a Predictor of Driving Performance Vulnerability following extended Wakefulness Open
Introduction Driver fatigue is a significant contributor to road crashes, but identifying individuals at driving risk is challenging. We examined the potential of simple baseline vestibular ocular motor system (VOMS) assessment via virtual…
O003 Investigating the relationship between core body temperature and changes in cognitive performance during simulated night shifts Open
Introduction The timing of circadian and sleep-wake behaviours is disrupted by night shift-work. Interventions involving light may prove beneficial in adjusting the circadian rhythm to shift work, although the changes in vigilance remain u…
O007 Validation of an under-mattress sleep tracker to estimate sleep and wake during day and night sleep opportunities Open
Introduction Consumer sleep trackers are useful for tracking daily sleep, particularly in shift-workers, yet large, multi-night validations against direct sleep measures are lacking. Conducted as one of the largest sleep tracker validation…
View article: O078 A Comparison of Subjective Sleepiness and Subjective driving Performance between People Vulnerable Versus Resistant to Driving Impairment following Extended Wakefulness.
O078 A Comparison of Subjective Sleepiness and Subjective driving Performance between People Vulnerable Versus Resistant to Driving Impairment following Extended Wakefulness. Open
Introduction Subjective sleepiness and driving performance are generally associated but show inter-individual variability. Specifically, some people are more vulnerable, while others are more resistant to driving impairment during extended…
View article: O072 Simple Vestibular-Occular Motor Assessment as a Predictor of Alertness State and Driving Impairment during Extended Wakefulness
O072 Simple Vestibular-Occular Motor Assessment as a Predictor of Alertness State and Driving Impairment during Extended Wakefulness Open
Introduction Driver fatigue contributes to 2-16% of road crashes, highlighting the need for improved detection of at-risk drivers. We used a novel and brief test of vestibular ocular motor system (VOMS) assessed via virtual reality goggles…
0005 A circadian-informed lighting intervention markedly improves vigilance in a simulated night shift setting Open
Introduction Due to misalignment between circadian timing and the work/rest schedule, cognitive performance during night shift-work is often poor. This study tested a circadian-informed lighting strategy designed to improve on-shift cognit…
0015 A circadian-informed lighting intervention markedly accelerates circadian adjustment to a night shift-work schedule Open
Introduction Night shift-work results in misalignment between circadian timing and the sleep/wake schedule, negatively impacting sleep and performance. In encapsulated environments (e.g., submarines), the lack of strong daily solar lightin…
Sleep Irregularity Is Associated With Hypertension: Findings From Over 2 Million Nights With a Large Global Population Sample Open
Background: Irregularities in sleep duration and sleep timing have emerged as potential risk factors for hypertension. This study examined associations between irregularity in sleep duration and timing with hypertension in a large, global …
P072 Predicting vigilance in a shift-work context with under-mattress sensor data from the preceding sleep Open
Introduction Performance impairments are risky in many industries, including healthcare and defence. Predicting when impairments are more likely to occur is critical to reduce costly workplace accidents and errors. This study created model…
O021 Investigation of a novel LED lighting strategy designed to accelerate circadian entrainment to night shift-work in an encapsulated environment Open
Introduction Shift-work results in misalignment between circadian timing and the sleep/wake schedule, negatively impacting sleep and performance. In encapsulated environments (e.g., submarines), the lack of strong daily lighting cues impai…