tuberomammillary nucleus


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lat·er·al hy·po·tha·lam·ic ar·e·a

[TA]
the portion of the hypothalamus located generally lateral to a rosterocaudal line drawn through the column of the fornix and the mammillothalamic tract; contains fibers collectively comprising the medial forebrain bundle [TA] and the following nuclei: portions of the preoptic area [TA] (area preoptica [TA]), portions of the lateral tuberal nuclei [TA] (nuclei tuberales laterales [TA]), the perifornical nucleus [TA] (nucleus perifornicalis [TA]), and the tuberomammillary nucleus [TA] (nucleus tuberomammillaris [TA]).
See also: hypothalamus.

tuberomammillary nucleus

A hypothalamic nucleus found just lateral to the medial mammillary nucleus. It is characterized by histaminergic axons that widely and diffusely innervate the entire brain. Neurons of this nucleus fire regularly when a person is awake and rarely during sleep. Stimulation of the tuberomammillary nucleus raises blood pressure and heart rate.
See also: nucleus