Sympathetic innervation of the median eminence

Bilateral removal of the superior cervical ganglia (SCG) decreases the adrenaline (NE) content of the median eminence. Bilateral removal of the SCG and bilateral deafferentation of the medial basal hypothalamus (MBH) together induce a greater decrease of NE content of the median eminence than that resulting from either one of the operations performed alone. Our results indicate that the median eminence receives a noradrenergic innervation arising from the SCG and that the SCG is the main origin of the NE remaining in the median eminence after bilateral deafferentation of the MBH.