Inferior hypophyseal artery

The inferior hypophyseal artery is a branch from the meningohypophyseal trunk, a branch of the C4 segment of the internal carotid artery. It is usually single on each side and divides into medial and lateral branches contributing to the inferior hypophyseal arterial circle.

The inferior hypophyseal artery supplies the posterior pituitary gland directly and often contributes to the pituitary stalk as well, hence contributing to the pituitary portal system.