Lewy body disease is a type of dementia. Dementia is the progressive loss of memory and various other mental functions, including the ability to learn, reason, and judge.

Brain Cells
Neurons
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Lewy body disease is associated with the build up of Lewy bodies in regions of the brain. These are abnormal protein deposits inside cells that play a role in certain aspects of memory, visual processing, and and motor control. It is not clear exactly what causes the build up of Lewy bodies in the brain.