In a study of seven patients with partial and in three with complete section of the corpus callosum, psychobiological changes were noted in only two. In both of these evidence of involvement of the right cerebrum was present.Consequently it appears that surgical section of the corpus callosum in epileptics does not result in the marked psychological changes noted by those investigators who have based their studies upon degenerative, vascular and neoplastic lesions in and about the corpus callosum.Abstract Teaser