Which Neurotransmitter is Involved in Both Parkinson's Disease and ADD

Question

Which neurotransmitter is involved in both Parkinson's disease and ADD?
A) acetylcholine
B) dopamine
C) serotonin
D) GABA

Accepted Answer

Both Parkinson's disease and attention deficit disorder (ADD) involve deficits in dopamine function. In Parkinson's disease, the degeneration of dopamine-producing neurons in the basal ganglia leads to motor symptoms such as tremors, rigidity, and bradykinesia. In ADD, dopamine deficits in the prefrontal cortex result in symptoms such as inattention, impulsivity, and hyperactivity.