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Central Sulcus
Precentral Sulcus
Superior Frontal Sulcus
Inferior Frontal Sulcus
Ascending Branch of Sylvian Fissure
Horizontal Branch of Sylvian Fissure
Lateral Orbital Sulcus
Frontomarginal Sulcus
Cingulate Sulcus
Paracentral Sulcus
Supraorbital Sulcus
Olfactory orbital sulcus
Sylvian Fissure Terminal Split
Sup. Temporal with Upper Branch
Inferior Temporal Sulcus
Occipito Temporal Sulcus
Collateral Sulcus
Transverse Temporal Sulcus
Circular Sulcus
Postcentral Sulcus
Intraparietal Sulcus
Occipito parietal Sulcus
Subparietal Sulcus
Calcarine Sulcus
Transverse Occipital Sulcus
Lateral Occipital Sulcus
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Olfactory Orbital Sulcus

 

The Olfactory Sulcus (OlfS) is the most mesial sulcus seen on the orbital surface of the hemisphere. The OlfS separates the gyrus rectus from the medial orbital gyrus. It is parallel to the interhemispheric fissure and has a straight postero-anterior course. It ends close to the pole but does not reach it completely (1,2). This sulcus is best seen when looking straight at the inferior surface of the hemisphere, but it can also be seen when looking at a tilted view, showing at the same time inferior and mesial surfaces of the hemisphere (3). In such a view its relation to the supraOS can be appreciated.