Not Otherwise Specified [NOS]). We also review functional brain imaging studies of patients with various forms of conversion disorder (. psychogenic motor or sensory changes, psychogenic blindness, pseudoseizures) as well as depersonalization disorder. As hypnotizability traits have been postulated to be associated with a higher tendency for developing dissociative symptoms, we briefly refer to functional imaging studies of hypnosis. In addition we make reference to neuroimaging investigations pertaining to dissociative symptoms of psychiatric conditions that are not categorized under the heading of dissociative (conversion) disorders, but may have dissociative symptoms as part of their clinical presentations (such as post-traumatic.