MyParkinsonsTeam

Between 18 to 41 percent of people with Parkinson's disease develop dementia or some form of cognitive decline. Up to 19 percent of people living with Parkinson's already have mild cognitive impairment (MCI) when first diagnosed with the condition. The progression from MCI to dementia can be quite gradual - it may take up Show Full Answer

Between 18 to 41 percent of people with Parkinson's disease develop dementia or some form of cognitive decline. Up to 19 percent of people living with Parkinson's already have mild cognitive impairment (MCI) when first diagnosed with the condition. The progression from MCI to dementia can be quite gradual - it may take up to 20 years for cognitive impairment to advance to dementia. While the exact cause of cognitive impairment in Parkinson's isn't fully understood, research suggests that sleep issues common in Parkinson's may be associated with cognitive decline.

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