The pars tuberalis is a thin sleeve of anterior pituitary tissue wrapped around the front and sides of the pituitary stalk. It is rich in melatonin receptors.
| Location | Around the infundibular stalk, extending up to the median eminence |
|---|---|
| Secretes |
|
| Nerve Supply | Hypothalamic nerve fibres |
| Blood Supply | Superior hypophyseal arteries; Hypophyseal portal vessels |
| Venous drainage |
|
Thought to help relay seasonal day-length signals from melatonin to the pituitary and hypothalamus.
Some tumours of the pituitary stalk region, such as craniopharyngiomas, may arise near the pars tuberalis. Its role in seasonal biology is studied mainly in animals.
Tumour or inflammation of the stalk region disrupting pituitary hormone control.
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