At the back end of the olfactory tract, fibres split into the lateral and medial olfactory striae around a small triangle (olfactory trigone) in front of the anterior perforated substance.
| Location | Base of the frontal lobe, at the posterior end of the olfactory tract |
|---|---|
| Parts |
|
| Connections | |
| Blood Supply | Anterior cerebral artery; Middle cerebral artery (lenticulostriate) branches |
The lateral stria carries smell signals to the olfactory cortex and amygdala; the medial stria to the septal region.
Smell reaches the cortex without first relaying in the thalamus, unlike other senses. Frontal base tumours such as olfactory groove meningioma can compress the pathway and cause loss of smell.
Tumour at the base of the frontal lobe causing loss of smell and personality change.
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