The hypothalamus is part of the brain, located at the central bottom portion of the brain (see below), serving an important purpose as the main link between the nervous system and endocrine system.  The hypothalamus uses many types of neurotransmitters and neuromodulators to control the nervous system.  Certain nerve cells in the hypothalamus control the endocrine system via the pituitary gland.  The pituitary gland is located directly below the hypothalamus.  The hypothalamus relays information sensed by the brain to the pituitary gland using neurohormones, also called hypothalamic-releasing hormones.

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