Olfactory trigone

The olfactory trigone is a small triangular area in front of the anterior perforated substance.

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)
Latintrigonum olfactorium
NeuroLex IDbirnlex_4042
Anatomical terms of neuroanatomy

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.[1]


This article incorporates text in the public domain from page 827 of the 20th edition of Gray's Anatomy (1918)

  1. Samudralwar DL, Diprete CC, Ni BF, Ehmann WD, Markesbery WR (June 1995). "Elemental imbalances in the olfactory pathway in Alzheimer's disease". J. Neurol. Sci. 130 (2): 139–45. doi:10.1016/0022-510X(95)00018-W. PMID 8586977.

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