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Brain microinjection studies in the rat using local anesthetics suggest that the rostral ventral medulla (RVM) contributes to the facilitation of neuropathic pain. However, these studies were restricted to a single model of neuropathic pain (the spinal nerve ligation model) and to just two stimulus modalities (non-noxious tactile stimulus and heat). Also, few neurotransmitter systems have been shown...
Rats were deprived of REM sleep for 24 h by keeping them on small platforms that were placed in a water bath (the platform method). Galanin coding mRNA was visualized using in situ hybridization, and cells expressing galanin mRNA were counted. In REM sleep-deprived animals the cell count was higher in the preoptic area and periventricular nucleus. Lesions of this area have been reported to induce...
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