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- W2077278867 abstract "The medial preoptic area (MPO) plays an important role in many behavioral, autonomic and endocrine functions, including micturition and genital responses. Although afferents of the MPO have been studied extensively, it is unknown whether direct lumbosacral-MPO projections exist that could convey afferent information from the pelvic organs. We hypothesized that, if such direct projections exist, MPO projecting cells would be located in the lateral part of the sacral cord, where primary afferents from pelvic and pudendal nerves terminate. We used retro- and anterograde tracing techniques in cat and guinea pig to study this. In cats, injections in the MPO resulted in labeled cells throughout the spinal cord, but with the highest density in the S1-S2 segments. In guinea pigs, labeled cells were found exclusively in the S1-S3 segments after MPO injections. Labeled cells in the sacral segments were not located in the lateral parts of the gray matter, but were found in the medial laminae VI-VII and dorsal lamina VIII in cats, and mainly in lamina X in guinea pigs. Anterograde tracing results after injections in the sacral cord in cats or guinea pigs showed labeled fibers in the MPO, just ventral to the anterior commissure. The central location of the cells of origin within the sacral cord, together with the termination pattern of the spino-MPO projections, strongly suggest a role for the spino-MPO pathway in the sensory relay of pelvic viscera, important for micturition and genital responses." @default.
- W2077278867 created "2016-06-24" @default.
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- W2077278867 date "2009-12-01" @default.
- W2077278867 modified "2023-10-17" @default.
- W2077278867 title "Direct projections from the sacral spinal cord to the medial preoptic area in cat and guinea pig" @default.
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- W2077278867 doi "https://doi.org/10.1016/j.neuroscience.2009.08.062" @default.
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