[citation needed] Upon increase in carbon dioxide level at central chemoreceptors, it stimulates the sympathetic system to constrict vessels.
The vasomotor center is a collection of integrating neurons in the medulla oblongata of the middle brain stem.
[3] The vasomotor center integrates nerve impulses from many places via the solitary nucleus:[4] The vasomotor center gives off sympathetic fibres through the spinal cord and sympathetic ganglia, which reach vascular smooth muscle.
[1] A drop in blood pressure leads to increased sympathetic tone from the vasomotor center.
[10] Unlike other parts of the body, where continued stimulation of acetylcholine receptors leads to recoverable paralysis, overstimulation of the vasomotor center is often causes a fatal rise in blood pressure.