Which of the following is NOT a cardinal motor symptom of Parkinson disease?

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Multiple Choice

Which of the following is NOT a cardinal motor symptom of Parkinson disease?

Explanation:
The main idea is that Parkinson disease shows a set of motor signs driven by loss of dopamine in the substantia nigra that disrupts basal ganglia circuits. This leads to tremor at rest, bradykinesia, and rigidity as the hallmark motor features. Aphasia, on the other hand, is a language disorder caused by damage to language areas of the brain, not by the dopaminergic degeneration that drives Parkinson’s motor symptoms. Therefore, aphasia is not a cardinal motor symptom of Parkinson disease.

The main idea is that Parkinson disease shows a set of motor signs driven by loss of dopamine in the substantia nigra that disrupts basal ganglia circuits. This leads to tremor at rest, bradykinesia, and rigidity as the hallmark motor features. Aphasia, on the other hand, is a language disorder caused by damage to language areas of the brain, not by the dopaminergic degeneration that drives Parkinson’s motor symptoms. Therefore, aphasia is not a cardinal motor symptom of Parkinson disease.

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