A small, round bundle of nerve fibers connected to the corpus callosum that crosses the midline of the brain near anterior limit of the third ventricle (see figure below). One of three groups of commissural fibers, it connects, like the corpus callosum, the right and left cerebral hemispheres. Its smaller anterior part has fibers that connect the bilateral olfactory bulbs, and a larger posterior part that has a tract between the temporal lobes (as well as connecting these lobes to the amygdala and the opposite occipital lobe). Anterior commissure also refers to the point at the front of the larynx where the vocal folds join.
