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Microinjection of morphine into the rostral ventromedial medulla produces greater antinociception in male compared to female rats
Journal article   Peer reviewed

Microinjection of morphine into the rostral ventromedial medulla produces greater antinociception in male compared to female rats

Jill S Boyer, Michael M Morgan and Rebecca M Craft
Brain research, Vol.796(1), pp.315-318
1998
Handle:
https://hdl.handle.net/2376/106004
PMID: 9689486

Abstract

Nucleus raphe magnus Opioid Analgesia Locomotion Pain modulation Sex difference
The antinociceptive and locomotor effects of microinjecting morphine into the rostral ventromedial medulla (RVM) of male and female rats was assessed. Male rats showed greater antinociception than female rats at all doses and times following morphine administration. Male, but not female rats, also showed a dose dependent decrease in locomotion. These data demonstrate that sex differences in antinociception are mediated at least in part by the RVM.

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