Haloperidol or saline was administered to rats daily for 1, 8, 15 or 22 days. During haloperidol, but not saline administration, changes in plasma homovanillic acid (HVA) concentrations were correlated with changes in nucleus accumbens HVA. Haloperidol administration also had a significant effect on the intercorrelation of dopamine (DA) concentrations and indices of DA turnover across multiple brain areas. In particular, intercorrelations of HVA concentrations among DA terminal brain areas (i.e. striatum, nucleus accumbens, and olfactory tubercle) occurred only during haloperidol treatment.
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