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Tuberomammillary nucleus is a portion of the hypothalamus that is responsible for the release of histamine to the rest of the brain. It is the only source of histamine neurons in the brain, and it plays a crucial role in the regulation of the sleep-wake cycle and arousal.

Function

The tuberomammillary nucleus is involved in several important functions in the body. It is responsible for the release of histamine, which is a neurotransmitter that plays a crucial role in the regulation of the sleep-wake cycle, arousal, and other cognitive functions. The tuberomammillary nucleus also plays a role in the regulation of body temperature, appetite, and energy balance.

Anatomy

The tuberomammillary nucleus is located in the posterior hypothalamus, near the mammillary bodies. It is composed of histaminergic neurons, which are neurons that produce and release histamine. These neurons project to various areas of the brain, including the cortex, hippocampus, and amygdala, where they play a role in the regulation of various cognitive functions.

Clinical significance

Alterations in the function of the tuberomammillary nucleus and its histaminergic neurons have been implicated in several neurological and psychiatric disorders, including narcolepsy, Parkinson's disease, Alzheimer's disease, and depression. In particular, a decrease in histaminergic activity has been associated with increased sleepiness in narcolepsy and cognitive impairment in Alzheimer's disease.

See also

• Hypothalamus
• Histamine
• Sleep-wake cycle
• Arousal

References

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