Which neurotransmitter is involved in the movement disorders seen in Parkinson disease and in the deficits seen in schizophrenia and other psychoses?
a. Dopamine
b. Melatonin
c. Serotonin
d. Norepinephrine
A
Dopamine is derived from tyrosine, is located mostly in the brainstem, and is involved in control of complex movements, motivation, and cognition. It is involved in movement disorders such as Parkinson disease and in many of the deficits seen in schizophrenia and other forms of psychosis. This is not necessarily true of the other options.
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