Parkinson's Disease 2

Question 1

Which neurotransmitter is primarily deficient in the brains of people with Parkinson's disease?

Accepted Answer

Dopamine

Answer

Parkinson's disease results from the loss of dopamine-producing neurons in the substantia nigra.

Question 2

What are Lewy bodies, which are a hallmark pathological finding in Parkinson's disease?

Accepted Answer

Abnormal aggregates of alpha-synuclein protein

Answer

Lewy bodies are clumps of misfolded alpha-synuclein protein that accumulate inside neurons and are the defining pathological feature of Parkinson's disease.

Question 3

Parkinson's disease is classified as which type of neurological disorder?

Accepted Answer

Neurodegenerative disorder

Answer

Parkinson's is a progressive neurodegenerative disorder, meaning neurons gradually deteriorate and die over time.

Question 4

Which brain region is most affected by neuronal loss in Parkinson's disease?

Accepted Answer

Substantia nigra

Answer

Parkinson's disease is characterized by the degeneration of dopaminergic neurons in the substantia nigra pars compacta.

Question 5

At approximately what percentage of dopamine neuron loss do motor symptoms of Parkinson's disease typically appear?

Accepted Answer

60–80%

Answer

Motor symptoms typically emerge only after 60–80% of dopaminergic neurons in the substantia nigra have been lost, indicating significant reserve capacity.

Parkinson's Practice Test

Parkinson's Practice Test

Parkinson's Disease 2