The term lateral longitudinal stria refers to the more lateral of two thin bundles of myelinated fibers oriented longitudinally on the dorsal surface of the corpus callosum in the human ( Riley-1943 ). It is located in the callosal sulcus. Identified on the basis of topology and myelin stain, it extends from the dentate gyrus caudally to the paraterminal gyrus rostrally. The other bundIe is the medial longitudinal stria. They together with the indusium griseum constitute the supracallosal gyrus.