Progress in Neuro-Psychopharmacology and Biological Psychiatry
Full length original paper Clinical studyDifferential effects of dopaminergic drugs on anxiety and arousal in healthy volunteers with high and low anxiety
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2015, Psychiatry ResearchCitation Excerpt :In sharp contrast, however, administration of L-DOPA or D-amphetamine, have also been found to dampen aversive emotional reactions such as amygdalar reactivity to fearful faces and fear-potentiated startle to unpleasant stimuli (Delaveau et al., 2005, 2007, 2009; Corr and Kumari, 2013). This apparent inconsistency may be clarified when considering that increasing DA activity through pharmacological interventions only has anxiogenic effects in high-anxiety individuals, whereas in low-anxiety subjects, the same DA increase has an anxiolytic effect (Mizuki et al., 1997). Similarly, high-anxiety rats are less sensitive to the rewarding effects of amphetamine compared to low-anxiety rats, indicating that levels of trait-anxiety may also modulate the actual reward-enhancing effects of DA (Lehner et al., 2014).
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