the great majority of which tracts pass through the corpus callosum
Commissural fiber The commissural fibers make up tracts that include the corpus callosum, the anterior commissure, and the posterior commissure.
Language processing in the brain Much of the language function is processed in several association areas, and there are two well-identified areas that are considered vital for human communication: Wernicke's area and Broca's area. These areas are usually located in the dominant hemisphere (the left hemisphere in 97% of people) and are considered the most important areas for language processing. This is why language is considered a localized and lateralized function.[2]