Enhanced self-stimulation in the home cage but not in a novel cage environment after naloxone injection.
D000818:Animals; D004777:Environment; D006799:Housing, Animal; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D012653:Self Stimulation
D009270:Naloxone