π§ AI Just Mapped How Your Brain Cleans Itself While You Sleep β And There Are Two Speeds
Using physics-informed AI trained on MRI scans, researchers from the University of Rochester discovered that the brain's glymphatic waste-clearing fluid moves roughly 50 times faster around the outer surface than through deep tissue. This system β most active during deep sleep β flushes metabolic waste linked to Alzheimer's disease, and the findings, published in Science Advances, could explain why poor sleep is so strongly tied to neurodegeneration. Does knowing your brain is literally washing itself overnight change how you think about sleep?
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