The more we learn about sleep, the more we discover how important it is for both the mind and the body. It's no secret that lack of sleep can cause problems with learning and the ability to focus.

"I think you should look at sleep as one of the causes of ADHD," said Dr. Richard Millman, a sleep expert at Brown University Health. Millman is talking about lack of sleep and poor sleep. "The data ...

Sleep is essential to memory function. Insufficient sleep makes concentrating, absorbing information, and storing and recalling memories difficult. Adults need about seven to nine hours of sleep per ...

If you have trouble sleeping, you may take something to help you at night. You may “self-medicate” with illegal drugs, alcohol, or medication. But substance misuse or withdrawal from drugs can cause ...