Journal article
Effects of Chronic Morphine Treatment on Responding for Intracranial Stimulation in Female Versus Male Rats
Experimental and clinical psychopharmacology, Vol.9(2), pp.198-208
05/2001
Handle:
https://hdl.handle.net/2376/115497
PMID: 11518096
Abstract
Morphine was administered to Sprague-Dawley rats twice daily at 0, 3, 10, and 20 mg/kg/injection during Weeks 1, 2, 3, and 4, respectively; responding for medial forebrain bundle stimulation was assessed 1, 2, and 3 hr after morning injections in female versus male rats. There were no sex differences in responding under control conditions (Week 1). Morphine's effect on response rate depended on dose, time post-injection, stimulation frequency, and day of treatment. Significant sex differences in morphine's effects occurred at 10 mg/kg, which decreased responding more in males at 1 hr and increased responding more in females at 2 hr, at some frequencies and on some test days. Similar trends were observed at other frequencies, test days, and doses. Morphine's differential effect in males versus females in this procedure suggests that sex comparisons of opioid effects in many animal models may be influenced by sex differences in opioid effects on behavioral output.
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Details
- Title
- Effects of Chronic Morphine Treatment on Responding for Intracranial Stimulation in Female Versus Male Rats
- Creators
- Rebecca M Craft - Department of Psychology, Washington State UniversityErin C Stoffel - Department of Psychology, Washington State UniversityJulie A Stratmann - Department of Psychology, Washington State University
- Publication Details
- Experimental and clinical psychopharmacology, Vol.9(2), pp.198-208
- Academic Unit
- Psychology, Department of
- Publisher
- American Psychological Association
- Identifiers
- 99900548191501842
- Language
- English
- Resource Type
- Journal article