Longitudinal striae of Lancisi

In human neuroanatomy, the longitudinal striae of Lancisi (also "striae lancisi" or "nerves of Lancisi") are parts of the indusium griseum and represent bundles of fibers running along the corpus callosum of the brain. They were originally described by and are named after Italian physician, epidemiologist and anatomist Giovanni Maria Lancisi. The striae are categorized as medial or lateral striae; the area between medial striae are a useful neurosurgical mark of the middle of the corpus callosum.