Glossary

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Thermoregulation

The act of maintaining an organism’s temperature within certain normal boundaries. This can be achieved, for instance, by shivering to create heat or sweating to lose heat.

Theta activity

EEG activity with a frequency of 4–7 Hz or cycles per second.

Tuberomammillary nucleus (TMN)

An area of the hypothalamus that contains neurons that release histamine. This neurotransmitter stimulates arousal.

Ventrolateral preoptic area (VLPO)

An area of the brain in the hypothalamus that plays a key role in promoting sleep by inhibiting the brain’s primary arousal centers, such as the Tuberomammillary Nucleus (TMN).

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