A direct projection from the hypothalamus to the area postrema in the rat, as demonstrated by the HRP and autoradiographic methods |
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Authors: | Yasuhiko Hosoya Matsuo Matsushita |
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Affiliation: | Department of Anatomy, Institute of Basic Medical Sciences, University of Tsukuba, Niihari, Ibaraki 305 Japan |
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Abstract: | A direct hypothalamic afferent to the area postrema was found in the rat. After an injection of tritiated amino acids into the hypothalamus, labeled fibers and terminals were observed in the entire part of the area postrema, with dense patches of silver grains present in places. Cells of origin of this novel projection were identified with the retrograde horseradish peroxidase (HRP) method in the dorsal hypothalamic area at the most rostral level of the dorsomedial hypothalamic nucleus. |
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Keywords: | area postrema hypothalamus autoradiography horseradish peroxidase |
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