part of frontal lobe superior frontal gyrus 2010-10-08T09:11:01Z BTO:0004836 BrendaTissueOBO It makes up about one-third of the frontal lobe of the human brain. It is bounded laterally by the superior frontal sulcus. The superior frontal gyrus, like the inferior frontal gyrus and the middle frontal gyrus, is more of a region than a true gyrus. mgr