The superior sulcus (groove) may refer to: Superior sulcus of the human brain Superior frontal sulcus, a sulcus between the superior frontal gyrus and the middle frontal gyrus . Superior temporal sulcus, the sulcus separating the superior temporal gyrus from the middle temporal gyrus in the temporal lobe A groove in the first rib. It may be compressed in Pancoast tumors (also called superior sulcus tumors). Not to be confused with the superior thoracic aperture.