The olfactory trigone is a small triangular area in front of the

anterior perforated substance The anterior perforated substance is a part of the brain. It is bilateral. It is irregular and quadrilateral. It lies in front of the optic tract and behind the olfactory trigone. Structure The anterior perforated substance is bilateral. It ...

. Its apex, directed forward, occupies the posterior part of the

olfactory sulcus The olfactory tract (olfactory peduncle or olfactory stalk) is a bilateral bundle of afferent nerve fibers from the mitral and tufted cells of the olfactory bulb that connects to several target regions in the brain, including the piriform cort ...

, and is brought into view by throwing back the

olfactory tract The olfactory tract (olfactory peduncle or olfactory stalk) is a bilateral bundle of afferent nerve fibers from the mitral and tufted cells of the olfactory bulb that connects to several target regions in the brain, including the piriform cort ...

. It is part of the olfactory pathway.

References

Olfactory system {{Neuroanatomy-stub