20 Mar dopamine
A tyrosine-derived inhibitory neurotransmitter chemical found in the basal ganglia and corpus striatum. Dopamine deficiency is linked to Parkinson’s Disease. Loss or lack of dopamine in nigro-striatal neurons in the center of the brain is what causes the muscles to not operate as directed by those who suffer from Parkinson’s disease. Some studies also link a tendency toward alcoholism to dopamine.
References: brain physiology