# What is the hypothalamus?

It is called the hypothalamus. Gray's Anatomy (1918) describes it as a small region of the brain just below the thalamus.

## What it means

- A small region of the brain just below the thalamus.
- Regulates body temperature, hunger, thirst, and sleep.
- Controls the pituitary gland.

## Action steps

1. Below the thalamus.
2. Above the pituitary gland, to which it is attached by the pituitary stalk.
3. Forms the floor of the third ventricle.

## Sources

- [Gray's Anatomy of the Human Body (1918)](https://www.bartleby.com/107/)

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