AI Framework Maps Brain Fluid Movement to Reveal Waste-Clearing Mechanisms

For generations, the brain's internal housekeeping has remained beyond reach — its fluid currents too deep, too delicate to observe without breaking what one sought to understand. A team of researchers has now built an artificial intelligence system called MR-AIV that reconstructs, from ordinary hospital MRI scans, three-dimensional maps of how cerebrospinal and interstitial fluids move through the entire brain, carrying away the toxic debris implicated in diseases like Alzheimer's. The work reveals that the brain governs this flow not through pressure but through the selective permeability of