Pacchionian foramen

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Tentorium cerebelli
Illu tentorium.jpg
Tentorium cerebelli seen from above.
Part of Meninges
NeuroNames ancil-261
Anatomical terms of neuroanatomy

Pacchionian foramen means:

  1. incisurae tentorii (aka tentorial notch)[1][2][3]
  2. a thick opening in the center of the diaphragm of sella through which the infundibulum passes[4]

The Pacchionian foramen (incisura tentorii) is important due to some types of brain herniation through it, i.e. supratentorial, infratentorial herniation.

Tentorium cerebelli[edit]

The tentorium cerebelli divides the cranial cavity into two closed spaces which communicate with each other through the incisura tentorii. The larger anterior space includes the anterior and middle cranial fossas and lodges the cerebrum; the small posterior space— the posterior cranial fossa contains the cerebellum, the pons, and the medulla.[5]