The body of the fornix travels anteriorly and divides again near the anterior commissure. Examples are the posterior commissure and the corpus callosum. The tapetum and anterior commissure share the function of connecting left and right temporal lobes. The great majority of commissural tracts pass through the largest commissure the corpus callosum. The anterior commissure also serves to connect the two amygdalae. The terminal lamina creates the commissure plate. The spinal cord contains a commissure as well&colon; the anterior white commissure. Disruption of the posterior commissure can cause alexia without agraphia. It is situated above the periaqueductal grey and nucleus of the posterior commissure. It wraps around the top (dorsal), front, and bottom (ventral) surfaces of the anterior commissure. This approach involves creating a window at the anterior commissure, which is then displaced posteriorly. A tract may also be referred to as a commissure, fasciculus or decussation. The functionality of the anterior commissure is still not completely understood. These two crura are joined together through the hippocampal commissure. Diseases that involve the commissure include angular chelitis.