Sleep often gets pushed to the bottom of the priority list. Busy schedules, family obligations, and endless distractions make ...

Does too-high cortisol cause sleep disorders such as insomnia and sleep apnea, or is high cortisol a result of those sleep disorders? The answer is complex, and one that scientists are still reaching ...

Scientists discovered that sleep deprivation damages a key brain circuit responsible for social memory, making it harder to recognize familiar individuals. In laboratory studies, caffeine restored ...

A new study found that poor sleep was linked to memory problems and Alzheimer’s-related brain changes in older women with ...