In the Letter titled “Peripheral Nerve Involvement in Adult and Pediatric Patients With Central Nervous System Inflammatory Disease” published in the January issue of JAMA Neurology (2015;72[1]:123), incorrect information appeared. The terms electromyogram and electronystagmography should have been electromyography and electroneurography, respectively. Also, the authors’ full affiliation should have appeared as C. Mondino National Neurological Institute. This article was corrected online.