Starting Point: Posterior extent of superior temporal sulcus, main body

Direction: Anterior to Posterior

Ending Point: Most posterior high contrast point closest to the junction of the intraparietal and transverse occipital sulci.

Notes: This sulcus may not always be present, but when it is make sure to draw it along the path of least resistance. Occiasionally this sulcus runs into the temporo-occipital sulcus, if so, stop there.

Check Figure for Reference