Starting Point: Superior Temporal sulcus main body bifurcation
Direction: Inferior to Superior
Ending Point: Inside the angular gyrus
Notes: Do not draw the sulcus higher than the most superior aspect of the supermarginal gyrus. You might have to cross over a gyrus to complete the sulcus. It will often run very close to the Sylvian, but can also move back towards the occipital lobe. Runs between the secondary intermediate and the primary intermediate sulcus. Do not interfere with 22.