|Brain: Olfactory trigone
Scheme of rhinencephalon
. (Olfactory trigone not labeled, but region is visible at bottom left, between anterior perforated substance and olfactory tract.)
Human brainstem anterior view. (Olfactory trigone is #4, at upper right)
The olfactory trigone is a small triangular area in front of the anterior perforated substance.
Its apex, directed forward, occupies the posterior part of the olfactory sulcus, and is brought into view by throwing back the olfactory tract.
It is part of the olfactory pathway.
This article incorporates text from a public domain edition of Gray's Anatomy.