Olfactory Sulcus Of The Brain

Description

Olfactory sulcus (sulcus olfactorius) runs longitudinally along the inferior surface of the frontal lobe, lateral to the gyrus rectus and medial to the orbital gyri. Within this groove, the olfactory bulb sits anteriorly and the olfactory tract continues posteriorly toward the olfactory trigone, with the tract aligned parallel to the long axis of the frontal base. Medially, the interhemispheric fissure and crista galli region lie toward the midline, while laterally the orbital surface broadens toward the lateral orbital gyrus. A narrow corridor. Anosmia is often the first clinical clue when pathology occupies the olfactory groove, so defining the sulcus and its contents matters for both diagnosis and operative planning. Olfactory groove meningioma, frontoethmoidal sinus disease with intracranial extension, and traumatic injury near the cribriform plate can compress or shear the bulb and tract, and surgeons approaching the anterior cranial fossa must account for their position relative to the gyrus rectus and orbital cortex to reduce postoperative olfactory deficit and cerebrospinal fluid leak risk. The fixed inferior perspective and emphasis on the basal frontal landmarks make it easier to teach how the olfactory pathway begins at the bulb, then tracks posteriorly without being confused with adjacent orbital gyri. Neuroanatomy and head and neck anatomy courses can use this illustration to anchor the olfactory system in real frontal base topography, alongside discussions of the cribriform plate and anterior cranial fossa. It also fits neurosurgical and ENT publications describing endoscopic endonasal or subfrontal approaches, and radiology teaching files correlating coronal MRI of the olfactory cleft with anterior cranial fossa disease. Anatomical accuracy verified by SciePro's Medical Advisory Board.