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Inside Alzheimer’s
The PET scan (top left) depicts the brain of a normal person, while the scan to its right shows that of a person with Alzheimer’s. Studies using PET suggest a slowing of brain activity in certain regions of the Alzheimer’s brain (Alzheimer’s Association, 2013). The neurofibrillary tangles (bottom image, with tangles in pink) result from twisted protein fibers accumulating inside brain cells.
top: Jessica Wilson/Science Source; bottom: Thomas Deerinck, Ncmir/Science Source