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- W2023687319 abstract "Previously we reported that oxytocin (OT)-containing neurons of the hypothalamic paraventricular nucleus (PVN) project to the pre-Bötzinger complex (pre-BötC) region and phrenic motoneurons innervating the diaphragm (D). The aim of these studies was to determine pathways involved in PVN stimulation-induced changes in upper airway and chest wall pumping muscle activity. In addition, we determined the role of OT-containing neurons in the PVN in mediating increased respiratory output elicited by PVN stimulation. Neuroanatomical experiments, using pseudorabies virus (PRV) as a transneuronal tracer in C8 spinalectomized animals showed that PVN neurons project to hypoglossal motoneurons innervating the genioglossus (GG) muscle. Furthermore, microinjection of the PVN with bicuculline, a GABA A receptor antagonist, significantly increased ( P < 0.05) peak electromyographic activity of GG (GG EMG ) and of D EMG , frequency discharge, and arterial blood pressure (BP) and heart rate. Prior injection of OT antagonist [d-(CH 2 ) 5 ,Tyr(Me) 2 ,Orn 8 ]-vasotocin intracisternally or blockade of OT receptors in the pre-BötC region with OT antagonist l-368,899, diminished GG EMG and D EMG responses and blunted the increase in BP and heart rate to PVN stimulation. These data show that PVN stimulation affects central regulatory mechanisms via the pre-BötC region controlling both respiratory and cardiovascular functions. The parallel changes induced by PVN stimulation were mediated mainly through an OT-OT receptor signaling pathway." @default.
- W2023687319 created "2016-06-24" @default.
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- W2023687319 date "2007-01-01" @default.
- W2023687319 modified "2023-10-15" @default.
- W2023687319 title "Stimulation of the hypothalamic paraventricular nucleus modulates cardiorespiratory responses via oxytocinergic innervation of neurons in pre-Bötzinger complex" @default.
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- W2023687319 doi "https://doi.org/10.1152/japplphysiol.00522.2006" @default.
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