Is Lewy body dementia related to Parkinson's disease?

Q: Is Lewy body dementia related to Parkinson's disease?

Yes. Lewy body dementia and Parkinson's disease are closely related because both involve abnormal alpha-synuclein protein deposits in the brain. In Dementia with Lewy Bodies (DLB) , cognitive symptoms occur before or around the same time as movement problems. In Parkinson's disease dementia , movement symptoms begin first, followed by dementia later.