Epidural opioid analgesia in infant rats II: responses to carrageenan and capsaicin.


The aim of this study was to investigate the analgesic effects of epidural opioids upon persistent pain sensitivity in neonatal rat pups. Two models of persistent pain were used, subcutaneous injection of carrageenan, and topical application of capsaicin cream, both to the hind paw. The contribution of individual opioid receptor subtypes in the spinal cord… (More)


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