The time change can leave you yawning the next day. But for many Americans, sleep deprivation is a year-round problem.

slow-wave EEG activity, and circadian motor rhythms. Nevertheless, body temperature, heart rate, and blood pressure remain elevated (Reder, personal communication, 2005). Normal sleep-deprived ...

Researchers discovered that while a single dose of caffeine can improve attention in sleep-deprived individuals, regular high consumption of caffeine ... Additionally, the researchers recorded the ...