WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Nuclear magnetic resonance (NMR) scan of the brain of a person with Alzheimer's disease, the commonest cause of progressive presenile dementia and of severe dementia in old age. The disease produces a diffuse degeneration of brain tissue, in advanced cases the brain is severely atrophied. Symptoms include memory disorders, changes in personality, confusion and disorientation. The cause is unknown and no curative treatment is yet available.
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