(C) Labeling of adult corpus callosum with anti-neurofilaments antibody in sagittal sections. Outline depicts missing posterior part of the tract in crmp2-/- mice. Caudal part of the corpus callosum in WTs is located dorsally above the habenular commissure (hbc), while in crmp2-/- mice callosum terminates rostrally before reaching the hbc (arrows). PC indicates posterior commissure. Scale bars: 500 µm. 