Intraparietal Sulcus

The Intraparietal Sulcus (IPS) separates the superior parietal lobule from the inferior parietal lobule. It is best seen when looking at the dorsolateral surface of the hemisphere from above. The IPS is a long and deep antero-posterior sulcus, parallel to the intrahemispheric fissure. It starts at the postCS, either merging with it or not. Sometimes it can actually cross the postCS. It can also have an initial ascending course parallel to the postCS.

The first point of the curve should always be dropped behind the postCS (1), even when the IPS merges with the postCS. The ITS may or may not have real interruptions. The terminal point is posterior (2) at the level of the Transverse Occipital Sulcus (3).

USC Biomedical Imaging Research Lab © 2009, designed by Dimitrios Pantazis