Medical Definition of Lewy body
: an eosinophilic inclusion body found in the cytoplasm of neurons of the cortex and brain stem in Parkinson's disease, Lewy body disease, and other neurodegenerative disorders Postmortem brain tissue from [Parkinson's disease] patients reveals the presence of inclusions called Lewy bodies in dopaminergic neurons, although whether these inclusions are a cause or a result of the disease is still unclear.— Christian Haass and Philipp J. Kahle, Science, 13 July 2001 The scientists also report that alpha-synuclein exists in the Lewy bodies characteristic of another brain disorder, a type of dementia. — Science News, 18 Oct. 1997
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