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Olfactory Tract
Nervous System

Olfactory Tract

Tractus olfactorius

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Quick Facts

Origin: Olfactory bulb.

Course: Runs posteriorly from the olfactory bulb to the anterior perforated substance on the inferior surface of the cerebral cortex.

Branches: Olfactory striae.

Supply: Conveys the sense of smell.

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The olfactory tract originates at the posterior margin of the olfactory bulbs.


The olfactory tract runs parallel to and on either side of the midline on the inferior surface of the brain. The tract runs posteriorly to the anterior perforated substance where it bifurcates and penetrates the brain as the olfactory striae.


The olfactory tract bifurcates to give rise to the olfactory striae. Typically, there is a medial stria and a lateral stria.

Supplied Structures

The olfactory tract conveys sensory information. It supplies the sense of olfaction to the brain, specifically the primary olfactory cortex which is located in the uncus, and entorhinal cortex of the temporal lobe. Additionally, axons that form the olfactory tract will target the amygdala and other parts of the limbic system.

List of Clinical Correlates

- Anosmia

Learn more about this topic from other Elsevier products

Olfactory Tract

ScienceDirect image

In particular, the LOT, corpus callosum, and thalamocortical projections are all compact axonal tract that show an internal topographic organization (Inaki et al., 2004;

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