A study involving 187 children and adolescents with multiple sclerosis, plus 44 who experienced their first neurologic episode (clinically isolated syndrome) indicative of MS, has found that 35% of those with MS and 18% of those with clinically isolated syndrome were cognitively impaired. Cognitive assessment was done using a battery of 11 tests. The most common areas of impairment were fine motor coordination, visual-motor integration, and speeded information processing.
 Cognitive Impairment Occurs in Children and Adolescents With Multiple Sclerosis Results From a United States Network. Journal of Child Neurology. 28(1), 102 - 107.(2013).