which in turn oversee the body’s circadian -- and thus sleep -- cycles. Older adults also begin to process caffeine more slowly. That means the 2 p.m. coffee that previously didn’t affect ...

which control our sleep-wake cycles to generate our 24-hour circadian rhythms, the authors explained. Among older adults, the mechanisms and directionality of the relationship between vision and ...

It is known to have a strong effect on alertness and can shift our sleep-wake cycle. Previous studies have explored the use ...