Objective sleepiness evaluation is essential for the effect analysis of countermeasures for driver sleepiness, such as in-car stimulants. Furthermore, measuring drivers’ sleepiness in simulator studies also becomes important when investigating causes for task-related sleepiness, for example driving on monotonous routes, which requires little driver engagement. To evaluate driver sleepiness and ...

SLEEPINESS IS A MAJOR CONTRIBUTING FACTOR IN THE FREQUENCY OF HIGHWAY VEHICLE CRASHES and has serious consequences as it leads to a far higher fatality rate than other factors.1,2,3,4 The available data regarding the incidence of sleepiness vary considerably from country to country according to police methods for gathering data, to the population studied, to the definition of sleepiness adopted...

INTRODUCTION Sleepiness in students has an impact on their learning, focus and memory. Sleepiness is caused by multiple factors. Therefore, our objective was to estimate the frequency of sleepiness in Peruvian students and assess its relation to lifestyle and sleep habits. METHODS Cross-sectional study conducted on first through fifth year secondary students. The Spanish version of the pediat...

Subjective sleepiness is part of the system controlling the decision to go to sleep in humans. Extended periods of waking lead to increased sleepiness, as well as to changes in cortical electroencephalogram (EEG) during waking. We investigated the association of sleepiness and awake EEG spectra during 40 h of wakefulness using multi-electrode EEG recordings for full coverage of the scalp. We fo...

Investigators in previous research have indicated that subjective measures of sleepiness may separate into stateand behavior-based dimensions; however, researchers have not examined this under sleep deprivation conditions. The authors’ purpose in this study was to examine several measures of subjective sleepiness under sleep deprivation conditions following completion of various tasks. Fourteen...

OBJECTIVE The present investigation was designed to explore the role and implications of both daytime sleepiness and fatigue in obstructive sleep apnea syndrome with respect to sleep, perceived health quality, and psychological functioning. METHODS Our participants consisted of two groups: 124 older community volunteers who completed a polysomnographic sleep study and were diagnosed with slee...

Sleep disruption strongly influences daytime functioning; resultant sleepiness is recognised as a contributing risk-factor for individuals performing critical and dangerous tasks. While the relationship between sleep and sleepiness has been heavily investigated in the vulnerable sub-populations of shift workers and patients with sleep disorders, postpartum women have been comparatively overlook...

This overview presents aspects that link sleepiness and are reflected in a model. Sleepiness is a common health problem today, affecting up to one-third of the population and related to many work accidents and injuries. Traffic accidents related to sleepiness are one area that has drawn a fair amount of attention. A better general understanding of sleepiness in society, including causes of slee...

6 LIST OF ORIGINAL PAPERS 7 LIST OF ABBREVIATIONS 8 INTRODUCTION 9 AIMS 12 BACKGROUND 13 Sleep 13 A model of sleep regulation 13 Sleep EEG and sleep stages 14 Sleep cycles 15 Sleepiness 16 Definitions 16 Prevalence of sleepiness 17 Sleep deprivation 18 The Circadian rhythm 19 The Sleep debt 20 Shift work and sleepiness 22 The Countermeasures 23 Sleep, naps or breaks as countermeasure 23 Drugs a...