Older adults do not sleep as well as younger adults. Why? What alterations in sleep quantity
and quality occur as we age, and are there functional consequences? What are the …

The current meta-analytic review evaluated the effects of experimentally manipulated sleep
restriction on neurocognitive functioning. Random-effects models were employed to …

Sleep deprivation reduces regional cerebral metabolism within the prefrontal cortex, the
brain region most responsible for higher‐order cognitive processes, including judgment and …

Purpose Sleep duration is thought to play a key role in the development of metabolic
syndrome. However, the results have been inconsistent. Methods We conducted a …

The investigation of time-of-day effects on cognitive performance began in the early days of
psychophysiological performance assessments. Since then, standardised, highly controlled …

Delta activity on electroencephalogram (EEG) is considered a biomarker of homeostatic
sleep drive. Delta power is often associated with sleep duration and intensity. Here, we …

Abstract Slow waves (SW;< 4 Hz and> 75 μV) during non‐rapid eye movement (NREM)
sleep in humans are characterized by hyperpolarization [surface electroencephalogram …

Normal aging is accompanied by changes in the sleep quality, quantity, and architecture.
Specifically, there appears to be a measurable decrease in the ability of the healthy elderly …

Endogenous rhythms of circalunar periodicity (∼ 29.5 days) and their underlying molecular
and genetic basis have been demonstrated in a number of marine species [1, 2]. In contrast …

The reduction of electroencephalographic (EEG) slow‐wave activity (SWA)(EEG power
density between 0.75–4.5 Hz) and spindle frequency activity, together with an increase in …