Dopamine
Definition
Dopamine is a neurotransmitter that is implicated in the pathophysiology of many psychiatric and neurologic disorders. Its most notable psychiatric role is in the pathophysiology of psychosis and schizophrenia, particularly the presence of hallucinations and delusions. However, among a complicated network of neural pathways, dopamine is also believed to influence mood states, anxiety, cognition, and the presence of repetitive symptoms experienced in conditions like autism spectrum disorders (ASD), Tourette’s disorder, and obsessive-compulsive disorder. For these reasons, dopamine is the target of research attempting to uncover etiologies and treatments for such diseases. Understanding dopamine’s relationship to ASD may offer much insight into the pathophysiology of its symptoms.
Dopamine is synthesized in specialized neurons using the amino acid precursor tyrosine (Stahl, 2008). Tyrosine is first pumped from the extracellular space into dopaminergic neurons by a tyrosine...
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