No abstract available
Publication types
-
Letter
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Animals
-
Cocaine / pharmacology*
-
Conditioning, Operant / drug effects*
-
Conditioning, Operant / physiology
-
Dose-Response Relationship, Drug
-
Drug Tolerance / physiology
-
Heroin / pharmacology
-
Humans
-
Reaction Time / drug effects*
-
Reaction Time / physiology
-
Reinforcement Schedule
-
Reinforcement, Psychology*