Hypothalamus

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** A small, cone shaped collection of nuclei in the brain that is located below the thalamus and forms the lower side wall and floor of the third ventricle. It regulates homeostasis, the sleep-wake cycle, and metabolism, and plays a role in autonomic, endocrine, and motor function control.

**Synonyms:** - BRAIN, HYPOTHALAMUS - HYPOTHALAMUS - Hypothalamic structure (body structure) - hypothalamus - hypothalamus