Article ID Journal Published Year Pages File Type
2552920 Life Sciences 2008 8 Pages PDF
Abstract

We investigated the role of the hypothalamic supraoptic nucleus (SON) in nociception in the rat. Electrical stimulation of the SON or microinjection of a small dose of l-glutamate sodium into the SON elevated the nociceptive threshold in a dose-dependent manner, while cauterization of the SON decreased the nociceptive threshold. Pituitary removal did not influence the antinociceptive effect of l-glutamate sodium in the SON. The data suggested that the neurons and not the nervous fibers in the SON played an important role in antinociception.

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