Exciting: Study Reveals How Sleep Removes Toxic Waste from the Brain

by Elizabeth Renter
Natural Society
Feb 20, 2014

(NaturalSociety) Although we don’t know exactly why, there is no question that sleep is crucial for brain and overall health. Without proper sleep, the chance of disease and stress increases notably. Now, researchers at the University of Rochester Medical Center (URMC) Center for Translational Neuromedicine have found that sleeping actually helps detoxify the brain, potentially offering clues into dementia and Alzheimer’s disease.

The study, published in the journal Science, reveals that your brain has a unique method of removing toxic waste through ‘the glymphatic system’. Even more interesting, it seems that brain cells shrink by about 60% during sleep, allowing for waste to be removed more easily.

“Sleep changes the cellular structure of the brain,” said Maiken Nedergaard, co-author of the study. “It appears to be a completely different state.”

How Sleep Aids the Brain

The research looked at something called the glymphatic system of the brain. Injecting dye into the brains of mice, they watched the flow of cerebrospinal fluid (CSF) and found that the CSF flowed rapidly when the mice were unconscious (whether asleep or sedated) and barely moved when the mice were awake.