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1. Nausea

   Linked via "sympathetic nervous system activation"

   Nausea is a subjective, visceral sensation characterized by an unpleasant, urgent feeling of impending emesis (vomiting). While intrinsically linked to the act of vomiting, nausea is distinct, often preceding the physical expulsion by a measurable interval, allowing for preparatory sympathetic nervous system activation. Physiologically, nausea is mediated primarily through the chemoreceptor trigger zone (CTZ)/) located in the area postrema of the [medulla oblongata](/e…