part of frontal lobe inferior frontal gyrus 2010-10-08T09:10:49Z A gyrus of the frontal lobe of the human brain. Its superior border is the inferior frontal sulcus, its inferior border the lateral fissure, and its posterior border is the inferior precentral sulcus. Above it is the middle frontal gyrus, behind it the precentral gyrus. BTO:0004835 BrendaTissueOBO mgr