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  • Title: Reduced hypothalamic thermosensitivity following intraventricular injection of pyrogen in conscious rabbits.
    Author: Kruk B, Lyszczarz J, Laszczyńska J.
    Journal: Brain Res; 1983 May 16; 267(2):237-40. PubMed ID: 6347334.
    Abstract:
    Hypothalamic temperature thresholds for vasodilatory and respiratory reactions were determined before and after i.c.v. injection of pyrogen in rabbits. During the rising phase of fever the increases in the hypothalamic thresholds for vasodilatory and respiratory reactions differed from those found in the pre-pyrogen preoptic anterior hypothalamic area (POAH) heating by 2.1 +/- 0.2 degrees C and 1.89 +/- 0.31 degrees C, respectively. During the plateau phase of fever the threshold for vasodilatory reaction was further increased (by 0.7 +/- 0.23 degrees C), whereas that for panting remained at the same level. It is concluded that pyrogen exerts a depressive action on POAH thermosensitivity.
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