OtherNEUROPHARMACOLOGY
Opioid Regulation of Pallidal Enkephalin Release: Bimodal Effects of Locally Administered Mu and DeltaOpioid Agonists in Freely Moving Rats
M. Foster Olive and Nigel T. Maidment
Journal of Pharmacology and Experimental Therapeutics June 1998, 285 (3) 1310-1316;