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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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Collateral Sulcus

 

The Collateral Sulcus (ColS) is yet another anteroposteriorly running temporal sulcus. It is the most mesial temporal sulcus and provides the lateral limit of the parahippocampal gyrus. The ColS is best seen with the surface rendering tilted halfway between a mesial and an inferior position (1). The anterior end often merges with the rhinal sulcus to form the antero-medial border of the uncus. Here, to facilitate the marking of the curve, we include the rhinal sulcus a the most anterior segment of the collateral sulcus. Drop the starting point here (1). The ColS runs posteriorly paralll to the hippocampal fissure (3). It often splits into two rami which continue into the occipital lobe. The lower, or more lateral ramus (5) will separate the lingual and fusiform gyri in the mesial occipital lobe. The sulcus should be terminated at the posterior end of the temporal lobe, or continued into the occipital lobe chosing the lateral terminal branch. Once again, the importance is to be consistent across subjects.