Discriminative stimulus effects of a centrally administered , delta-opioid peptide ( oPen 2-oPenS-enkephalin ) in pigeons

@inproceedings{Jewett2005DiscriminativeSE,
  title={Discriminative stimulus effects of a centrally administered , delta-opioid peptide ( oPen 2-oPenS-enkephalin ) in pigeons},
  author={David C. Jewett and Henry I. Mosberg and J. H. Woods},
  year={2005}
}
The present study assessed the discriminative stimulus effects of the delta-opioid agonist [D-Pen2-D PenS]enkephalin (DPDPE) in pigeons. Food-restricted pigeons were trained to discriminate between ICV injections of 100 gg [D-Pen2-D-PenS]enkephalin (DPDPE) and saline in a two-key operant procedure; acquisition of discriminative control was rapid (14-28… CONTINUE READING