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PARKINSON'S DISEASE is caused primarily by:
AExcess serotonin in the brain
BDeficiency of dopamine in substantia nigra
CAutoimmune attack on myelin sheaths
Dβ-amyloid plaque buildup in cortex
Answer & Solution
Correct answer: B. Deficiency of dopamine in substantia nigra
PARKINSON'S: degeneration of dopaminergic neurons in the SUBSTANTIA NIGRA → dopamine deficiency → tremors, rigidity, slow movement. Treatment: L-DOPA (precursor of dopamine). Alzheimer's: β-amyloid. MS: autoimmune attack on myelin.
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