Effect of quinpirole on timing behaviour in the free-operant psychophysical procedure: evidence for the involvement of D2 dopamine receptors

@article{Cheung2007EffectOQ,
  title={Effect of quinpirole on timing behaviour in the free-operant psychophysical procedure: evidence for the involvement of D2 dopamine receptors},
  author={Timothy H. C. Cheung and G. Bezzina and C. L. Hampson and Simon C. Body and Kevin C.F. Fone and Christopher M. Bradshaw and Elem{\'e}r Szabadi},
  journal={Psychopharmacology},
  year={2007},
  volume={193},
  pages={423-436}
}
RationaleOperant timing behaviour is sensitive to dopaminergic manipulations. It has been proposed that this effect is mediated principally by D2-like dopamine receptors. However, we recently found that the effect of d-amphetamine on timing in the free-operant psychophysical procedure was mediated by D1-like dopamine receptors. It has not been established whether stimulation of D2-like receptors affects timing in this schedule.ObjectiveTo examine the effects of a D2-like receptor agonist… 
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