Amyloid plaques found in the brains of Alzheimer’s patients have been a subject of scientific discussion for years.   Scientists have thought that either  (1) the plaques have caused Alzheimer’s disease or (2) these plaques were generated as the disease progresses. Ganesh M. Shankar, Ph.D., and Dennis J. Selkoe, M.D., of Brigham and Women’s Hospital and […]