hypothalamus

https://doi.org/10.1351/goldbook.10833

Region at the base of the brain containing specialized nerve cells that help activate, control, and integrate peripheral autonomic mechanisms, endocrine activities, and some somatic functions such as body temperature, sleep, and appetite.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 767 [Terms] [Paper]