Vasomotor center

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The vasomotor center (VMC) is a portion of the medulla oblongata^[1] that regulates blood pressure and other homeostatic processes. Upon increase in carbon dioxide level at central chemoreceptors, it stimulates the sympathetic system to constrict vessels. This is opposite to carbon dioxide in tissues causing vasodilatation, especially in the brain.^[2] 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.

References

↑ "Blood Vessels". Retrieved 2008-10-06.
↑ "Bionic blood pressure device being developed at Vanderbilt". Retrieved 2008-10-06.

Human brain: rhombencephalon, myelencephalon: medulla (TA A14.1.04, GA 9.767)

Dorsal

Surface

Grey: Cranial nuclei

afferent:	GVA: VII,IX,X: Solitary/tract/Dorsal respiratory group SVA: Gustatory nucleus GSA: VIII-v Lateral Medial Inferior

efferent:	GSE: XII GVE: IX,X,XI: Ambiguus SVE: X: Dorsal IX: Inferior salivatory nucleus

Grey: other

White: Sensory/ascending

White: Motor/descending

Ventral

White: Motor/descending	Motor decussation Olivocerebellar tract Rubro-olivary tract

Grey matter	Ventral respiratory group Arcuate nucleus of medulla Inferior olivary nucleus Rostral ventromedial medulla

Surface	Anterior median fissure Anterolateral sulcus Olive Pyramid

Grey: Raphe/
reticular

M: CNS

anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug (N1A/2AB/C/3/4/7A/B/C/D)

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