Retrieving "Area Postrema" from the archives

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1. Nausea

   Linked via "area postrema"

   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…

2. Serotonin

   Linked via "Area Postrema"

   | $5-\text{HT}_{1\text{A}}$ | Dorsal Raphe, Hippocampus | Autoinhibition, anxiolysis | Decreased generalized worry states. |
   | $5-\text{HT}_{2\text{A}}$ | Cortex, Basal Ganglia | Excitatory; modulation of perception | Increased sensitivity to perceived social geometries [4]. |
   | $5-\text{HT}_{3}$ | Brainstem (Area Postrema) | Ligand-gated ion…