Sleep timing is controlled by the subtle interplay between circadian and homeostatic
oscillators which, according to their endogenous properties, allow beings to feel …

Methods Specific studies and articles were reviewed to illustrate what the test measures, to
evaluate its sensitivity to change, and to discuss its use in clinical practice. Results The …

Vigilant attention is a major component of a wide range of cognitive performance tasks.
Vigilant attention is impaired by sleep deprivation and restored after rest breaks and (more …

At the core of human thought, for the majority of individuals in the developed nations at least,
there is the tacit assumption that as a species we are unfettered by the demands imposed by …

Abstract Study Objectives: The psychomotor vigilance test (PVT) is among the most widely
used measures of behavioral alertness, but there is large variation among published studies …

Human electroencephalographic (EEG) oscillations characterize specific behavioral and
vigilance states. The frequency of these oscillations is typically sufficient to distinguish a …

Sleep deprivation is commonplace in modern society, but its far-reaching effects on
cognitive performance are only beginning to be understood from a scientific perspective …

Critically ill patients frequently experience poor sleep, characterized by frequent disruptions,
loss of circadian rhythms, and a paucity of time spent in restorative sleep stages. Factors that …

Safety and productivity in the workplace are intimately related to worker health. A workplace
may have chemical, physical, biological, and/or psychosocial hazards that have the potential …

The energy allocation (EA) model defines behavioral strategies that optimize the temporal
utilization of energy to maximize reproductive success. This model proposes that all species …