1987 | OriginalPaper | Chapter
Intrathecal Substance P Produces a Long-Term Inhibition of the Spinal Analgesic Effect of Noradrenaline
Authors : J. Sawynok, P. W. Nance
Published in: Substance P and Neurokinins
Publisher: Springer New York
Included in: Professional Book Archive
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The local application of noradrenaline (NA), clonidine and ST-91 to the spinal cord by intrathecal (i.t.) injection produces analgesia in a variety of test systems in a number of species (reviewed ref. 1). Alpha-2 adrenergic receptors are implicated in analgesia produced by these agents. The mechanisms by which these agents produce analgesia are not clearly defined. Electrophysiologically, there is evidence for both pre- and postsynaptic effects of NA [1].