Morphine self-administration, food-reinforced, and avoidance behaviors in rhesus monkeys

Abstract

1. A fixed interval-fixed ratio chain of behavior was maintained for periods as long as 6 months by intravenously administered morphine.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46396/1/213_2004_Article_BF00413045.pd

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