The name "conversion disorder" refers to a hypothesis based on psychoanalytic etiology. Although long dominant, the conversion hypothesis is now just one of many competing etiological hypotheses and has little supportive empirical evidence. Even the notion that the etiology of these symptoms is wholly psychological may be scientifically incorrect. For example, functional brain imaging studies showing findings such as contralateral thalamic hypoactivity in hemisensory conversion encourage us to understand conversion symptoms from a brain as well as mind perspective (2). Furthermore, the name "conversion disorder" has not been widely accepted by either nonpsychiatrists or patients (3, 4). We therefore need a name that sidesteps an unhelpful brain/mind dichotomy, will be more widely used clinically, and will be more accepted by patients (5). We suggest that the term "functional neurological disorder," as a diagnosis for symptoms such as "functional weakness," would be practically and theoretically more useful (6). This would be a return to an older terminology that is in keeping with the concept of functional somatic symptoms (7).