Sleep tendency (latency to sleep onset) was examined during extended waking in prepubertal and mature adolescents to determine whether sleep pressure is lower near bedtime in the latter group. Participants were nine prepubertal (pubertal stage Tanner 1, mean age 11.1 years, SD+/-1.3 years, five males) and 11 pubertally mature adolescents (Tanner 5, 13.9+/-1.2 years, three males). They spent 10 ...

House officers are known to endure marked levels of sleep deprivation in administration of their duties. We aim to establish sleep patterns of local house officers while on the job and the impact it might have on their mood and sleepiness state. We also studied their sleep during their final year of medical school and pre-university for identification of any prior sleep deprivation. Questionnai...

STUDY OBJECTIVES Previous studies have demonstrated that as little as 18 hours of sleep deprivation can cause deleterious effects on performance. It has also been suggested that sleep deprivation can cause a "tunnel-vision" effect, in which attention is restricted to the center of the visual field. The current study aimed to replicate these behavioral effects and to examine the electrophysiolog...

Covid-19 pandemic has altered students' sleep patterns due to increasing academic demands as a compromise switching the learning mode from direct classroom interaction online learning. As result, some believed it would affect quality of cognitive functions. We conducted one experiment involving ~200 undergraduate students measure their inhibitory control -a segment process that allows controlli...

Study Objectives: To test the hypothesis that total sleep deprivation (SD) slows stimulus detection and evaluation processes. Towards that end we manipulate degradation of the imperative stimulus, a manipulation well established to affect the processes of interest, in a delayed letter recognition (DLR) task and the psychomotor vigilance task (PVT), and predicted that after SD the ordinary react...

Cortical synchronization during NREM sleep, characterized by electroencephalographic slow waves (SW <4 Hz and >75 µV), is strongly related to the number of hours of wakefulness prior to sleep and to the quality of the waking experience. Whether a similar increase in wakefulness length leads to a comparable enhancement in NREM sleep cortical synchronization in young and older subjects is still a...

The negative effects of sleep deprivation on alertness and cognitive performance suggest decreases in brain activity and function, primarily in the thalamus, a subcortical structure involved in alertness and attention, and in the prefrontal cortex, a region subserving alertness, attention, and higher-order cognitive processes. To test this hypothesis, 17 normal subjects were scanned for quantif...

BACKGROUND Prior studies have shown that sleep disturbances are related to falling and its risk factors, such as poorer cognition, depression, and physical function. However, little is know about the gender-specific associations between falling and sleep duration. METHODS Study participants were from the annual Health Examination for the Elderly Program in the National Taiwan University Hospi...

People sometimes claim with high confidence to remember events that in fact never happened, typically due to strong semantic associations with actually encoded events. Sleep is known to provide optimal neurobiological conditions for consolidation of memories for long-term storage, whereas sleep deprivation acutely impairs retrieval of stored memories. Here, focusing on the role of sleep-related...

We wished to investigate the effects of sleep deprivation on sleep, arousal propensity, respiratory events and peripheral chemoresponses in healthy infants, since these effects might be relevant to mechanisms concerned with some cases of sudden infant death syndrome. Paired observations were made overnight during natural sleep and following sleep deprivation, in a randomized fashion, in 15 heal...