part of part of intralingual sulcus ILS It is not found in the macaque or in the smooth cerebral cortex of the rat or mouse ( NeuroNames ) UMLS:C0694595 sulcus intralingualis BIRNLEX:4019 BAMS:ils HBA:9397 A groove located within the boundaries of the lingual gyrus in the human. Identified by dissection, it is oriented parallel to the inferior margin of the occipital lobe ( Ono-1990; Duvernoy-1992 ). UBERON:0002905 FMA:83789 neuronames:151 lingual gyrus subarachnoid sulcus occipital sulcus