Parkinson's Parkinson's Mental Health and Cognitive Changes

Question 1

What percentage of Parkinson's disease patients eventually develop Parkinson's disease dementia (PDD)?

Accepted Answer

60-80%

Answer

Studies consistently show that 60-80% of Parkinson's patients develop dementia over the long course of their disease.

Question 2

Which cognitive domain is MOST commonly affected in the early stages of Parkinson's disease?

Accepted Answer

Executive function

Answer

Executive function — including planning, problem-solving, and cognitive flexibility — is typically the earliest and most prominently affected domain due to frontostriatal dopamine loss.

Question 3

What term describes mild cognitive impairment in Parkinson's disease that does not yet meet criteria for dementia?

Accepted Answer

PD-MCI

Answer

PD-MCI (mild cognitive impairment in Parkinson's disease) describes noticeable cognitive decline that does not significantly interfere with daily functioning.

Question 4

Which neurotransmitter deficiency, beyond dopamine, most significantly contributes to cognitive decline in Parkinson's disease?

Accepted Answer

Acetylcholine

Answer

Loss of cholinergic neurons in the nucleus basalis of Meynert reduces acetylcholine levels and plays a major role in cognitive impairment in PD.

Question 5

How is Parkinson's disease dementia (PDD) clinically distinguished from Dementia with Lewy Bodies (DLB)?

Accepted Answer

Dementia occurs more than 1 year after PD motor onset in PDD, within 1 year or before in DLB

Answer

By the 1-year rule, DLB is diagnosed when dementia precedes or appears within 1 year of parkinsonism, while PDD is diagnosed when dementia follows established PD by more than 1 year.

Parkinson's Practice Test

Parkinson's Practice Test

Parkinson's Parkinson's Mental Health and Cognitive Changes