EVAN OTO / SCIENCE PHOTO LIBRARY EVAN OTO / SCIENCE PHOTO LIBRARY
An illustration of the stages of Alzheimer's disease, a progressive brain disease that is the most common form of dementia. The disease is characterized by the loss of neurons in the brain, leading to gradual atrophy of the cerebral cortex and loss of cognitive function. The top row shows a lateral view of the brain during the disease's progression as the cerebral cortex begins to deteriorate. The bottom row shows a corresponding set of coronal sections of the brain during the different stages of the disease, depicting the shrinkage of the cerebral cortex and hippocampus, and the development of enlarged ventricles.
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