The vasomotor center (VMC) is a portion of the medulla oblongata that regulates blood pressure and other homeostatic processes. Upon increase in blood carbon dioxide level, it stimulates the sympathetic system to constrict vessels. This is opposite to carbon dioxide in tissues causing vasodilatation, especially in the brain. Cranial nerves IX (Glossopharyngeal nerve) and X Vagus nerve both feed into the vasomotor centre and are themselves involved in the regulation of blood pressure.
Famous quotes containing the word center:
“My center is giving way, my right is in retreat; situation excellent. I shall attack.”
—Ferdinand Foch (1851–1929)