The meningohypophyseal trunk, also known as the posterior trunk, is a branch of the C4 segment of the internal carotid artery. It is, as opposed to the inferolateral trunk, almost always identified at dissection and usually visualised on good quality angiography.
Inferior hypophyseal artery: to the pituitary gland, contributing to the “inferior hypophyseal arterial circle”
Marginal tentorial artery: to the meninges of the tentorium.
Tentorial basal branch
Tentorial marginal branch
Meningeal branch - helps supply blood to the meninges of the anterior cranial fossa
Clivus branches - tiny branches that supply the clivus
Inferior hypophyseal artery
Capsular branches - supplies wall of cavernous sinus
Branches of the inferolateral trunk:
Branches to trigeminal ganglion - provide blood to trigeminal ganglion
Artery of the foramen rotundum
Branches to nerves