AdvertisementLack Of Deep Sleep May Set The Stage For Alzheimer'sJanuary 04, 2016Jon HamiltonfacebookEmailJeffrey Iliff (right) and Bill Rooney, brain scientists at Oregon Health & Science University, look over an MRI. The school has an especially sensitive MRI unit that should be able to detect precisely when during sleep the brain is being cleansed of toxins. (Courtesy of Oregon Health & Science University)