Marco Aurélio Gomes Veado Passing along this meaningful insight from MCI and Beyond. The origins of dementia remain one of the greatest mysteries in neuroscience. For decades, researchers have focused on beta-amyloid plaques  as the main culprit in Alzheimer’s disease. Yet, emerging perspectives suggest that the real problem may lie in the immune system itself,  a case of “friendly fire,” where the brain’s own defense mechanisms mistakenly damage healthy neurons. This   MCI a