Parkinson's Disease 4 — Questions and Answers
Question 1: What percentage of Parkinson's disease cases are estimated to be caused by genetic mutations?
- Less than 1%
- 5–10% (Correct answer)
- 30–40%
- More than 60%
Correct answer: 5–10%
Approximately 5–10% of Parkinson's disease cases are linked to identified genetic mutations, while the majority are idiopathic (unknown cause).
Question 2: Mutations in which gene are the most common genetic cause of Parkinson's disease?
- BRCA1
- LRRK2 (Correct answer)
- HTT
- APOE
Correct answer: LRRK2
Mutations in the LRRK2 (leucine-rich repeat kinase 2) gene are the most common known genetic cause of Parkinson's disease.
Question 3: Which environmental exposure has been most consistently associated with an increased risk of Parkinson's disease?
- Heavy alcohol consumption
- Pesticide and herbicide exposure (Correct answer)
- High-fat diet
- Air pollution from traffic
Correct answer: Pesticide and herbicide exposure
Exposure to pesticides and herbicides, such as rotenone and paraquat, has been the most consistently identified environmental risk factor for Parkinson's disease.
Question 4: Which of the following is considered PROTECTIVE against developing Parkinson's disease based on epidemiological studies?
- High intake of red meat
- Caffeine consumption (Correct answer)
- Low physical activity
- Rural residence
Correct answer: Caffeine consumption
Multiple epidemiological studies have found that caffeine consumption is inversely associated with Parkinson's disease risk, suggesting a protective effect.
Question 5: What is the average age of onset for Parkinson's disease?
- Around 40 years old
- Around 60 years old (Correct answer)
- Around 75 years old
- Around 85 years old
Correct answer: Around 60 years old
The average age of onset for Parkinson's disease is approximately 60 years old, though young-onset PD can occur before age 50.
Question 6: What is meant by 'young-onset Parkinson's disease'?
- PD diagnosed in children under 12
- PD diagnosed in individuals under 50 years of age (Correct answer)
- PD with unusually rapid progression
- PD with prominent cognitive symptoms
Correct answer: PD diagnosed in individuals under 50 years of age
Young-onset Parkinson's disease is defined as PD diagnosed before age 50, and it is more likely to have a genetic cause.
Question 7: How does Parkinson's disease differ from Parkinsonism?
- They are identical conditions with different names
- Parkinsonism is a broader term for parkinsonian symptoms from any cause, while PD is a specific disease (Correct answer)
- Parkinsonism only affects younger patients
- Parkinson's disease always responds to levodopa while Parkinsonism never does
Correct answer: Parkinsonism is a broader term for parkinsonian symptoms from any cause, while PD is a specific disease
Parkinsonism describes the syndrome of parkinsonian motor symptoms that can arise from multiple causes including drugs, vascular disease, or other neurodegenerative diseases, while Parkinson's disease is a specific idiopathic neurodegenerative diagnosis.
Parkinson's Disease 4
What percentage of Parkinson's disease cases are estimated to be caused by genetic mutations?