Evaluation of the effects of opioid agonists and antagonists under a fixed-consecutive-number schedule in rats.

@article{Picker1987EvaluationOT,
  title={Evaluation of the effects of opioid agonists and antagonists under a fixed-consecutive-number schedule in rats.},
  author={M. J. Picker and Joachim W Heise and Linda A. Dykstra},
  journal={Pharmacology, biochemistry, and behavior},
  year={1987},
  volume={27 1},
  pages={73-80}
}
The effects of several opioid agonists and the opioid antagonist naloxone were examined in rats responding under a fixed-consecutive-number (FCN) schedule. Under this schedule, a reinforced response run consisted of responding eight or more times on one response lever, and then responding once on a second response lever. In one component of this schedule, an external discriminative stimulus signalled the completion of the response requirement on the first lever, whereas no stimulus change was… CONTINUE READING