Deep Sleep Takes Out The Trash

Sleepingdeeply helps rid the brain of waste.
Researchers looked at the brain activity and behavior of fruit flies. Theyfound that deep sleep clears waste from the brainincluding toxic proteins that may lead to brain diseaseslike Alzheimer's and Parkinson's. 

They say deep sleep likely has the same impact on humans because although fruitflies seem very different from people, the neurons that govern flies'sleep-wake cycles are strikingly similar.  

‍