Reading in bed might help you destress but it can also cause this one major issue in your sleep. An expert explains why and ...

During sleep, the brain weakens the new connections between neurons that had been forged while awake -- but only during the first half of a night's sleep, according to a new study. During sleep, the ...

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 ...