Intraparietal Sulcus (#15)
Starting Point: Post central sulcus
Direction: Anterior to Posterior
Ending Point: Transverse-occipital sulcus
Notes: Always a T-intersection at the anterior extent with Post Central (when it requires jumping a gyrus, take the path closest to the apex of the supermarginal gyrus). When the posterior/inferior extent is ambiguous, take the inferior extension (not part of post central sulcus). The Intraparietal sulcus always has a 1/2 Y shape relative to the midline.