Vasomotor center

 

 This is a center of the medulla of the brain which is responsible for maintaining blood pressure through the mechanism of cerebral ischemia. It is placed at the level of apex of the calamus scriptorius at the rhomboid fossa - which is the floor of 4th ventricle. The cerebral ischemia allows the accumulation of carbon dioxide and lack of oxygen, to include possibly increase in lactic acid and other acidic components in tissue to cause the  vasomotor center to excite vasoconstrictor neurons and cardioacceleratory neurons to pass signals into the peripheral circulation that will cause vasoconstriction and increase in heart rate and beat. The net effect would be to raise the peripheral blood pressure.


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