期刊
PHARMACOLOGICAL REPORTS
卷 64, 期 4, 页码 960-964出版社
POLISH ACAD SCIENCES INST PHARMACOLOGY
DOI: 10.1016/S1734-1140(12)70891-5
关键词
heroin; physical activity; positive reinforcement; rat; self-administration
资金
- US Public Service [DA027485]
- Duke Endowment
- Davidson College
Background: The purpose of this study was to examine the effects of voluntary wheel running on the positive reinforcing effects of heroin in rats with an established history of drug self-administration. Methods: Rats were assigned to sedentary (no wheel) and exercise (wheel) conditions and trained to self-administer cocaine under positive reinforcement contingencies. Rats acquiring cocaine self-administration were then tested with various doses of heroin during daily test sessions. Results: Sedentary rats self-administered more heroin than exercising rats, and this effect was greatest at low and moderate doses of heroin. Conclusion: These data suggest that voluntary wheel running decreases the positive reinforcing effects of heroin.
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