Morphine, but not atropine, blocks nociceptor-driven activity in rat dorsal hippocampal neurones.

Abstract

Neurones in the CA1 region of the dorsal hippocampus of urethane-anaesthetized rats were recorded extracellularly with microelectrodes, and tested for their response to non-noxious and noxious peripheral stimuli. None of the cells responded to non-noxious stimuli but 91 of 216 cells were excited by noxious stimuli. Morphine (5.0 mg/kg i.v.) increased the… (More)

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