The median eminence is a small swelling at the base of the hypothalamus where the pituitary stalk begins. Hypothalamic releasing hormones are released here into portal blood vessels that carry them to the anterior pituitary.
| Location | Floor of the third ventricle, part of the tuber cinereum, at the top of the infundibulum |
|---|---|
| Parts |
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| Connections |
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| Blood Supply | Superior hypophyseal arteries |
Delivers hypothalamic releasing and inhibiting hormones into the portal system that controls the anterior pituitary.
Damage to the stalk or median eminence from surgery, trauma or tumours cuts hypothalamic control, causing loss of most pituitary hormones but a rise in prolactin, which is normally held back by dopamine released here.
Injury interrupting hypothalamic control, causing hypopituitarism and mild high prolactin.
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