Some people who have Alzheimer’s disease pathology never get dementia because they have a protective biological mechanism working in their favor, a new study suggests. Researchers at the University of Texas Medical Branch studied postmortem brains and found that people who presented with brain pathology consistent with fully symptomatic Alzheimer’s disease—but not dementia—also had preserved autophagy, a physiological system that allows cells to recycle or eliminate junk and clutter. “This is significant, because...











