Normal and Alzheimer's disease brains

Normal and Alzheimer's disease brains

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Credit: DR ROBERT FRIEDLAND/SCIENCE PHOTO LIBRARY

Caption: Alzheimer's disease. Coloured Positron Emission Tomography (PET) scans of the brain of a normal patient (left) versus an Alzheimer's disease patient. Horizontal brain sections are seen. Colour-coding: high brain activity (red and yellow); low activity (blue and black). The scan on the right shows reduction of both function and blood flow in both sides of the brain, a feature often seen in Alzheimer's. Alzheimer's disease is a major cause of dementia in the elderly. To obtain the PET scans a radioactive tracer is injected into the blood to reveal metabolic activity in the brain.

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Keywords: alzheimer's, alzheimer's disease, alzheimers disease, brain, brain scan, condition, disorder, healthcare, medical, medicine, neuroimaging, pet scan, senile dementia

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