Naltrexone antagonism of exploration in the rat.
D000818:Animals; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D004723:Endorphins / Q000502:physiology; D005106:Exploratory Behavior / Q000187:drug effects* / Q000502:physiology; D008297:Male; D009043:Motor Activity / Q000187:drug effects* / Q000502:physiology; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000494:pharmacology*; D051381:Rats
D004723:Endorphins; D009270:Naloxone; D009271:Naltrexone