Brain imaging studies at the National Institute of Mental Health (NIMH) have revealed dramatic evidence of a deficit in the brain's visual system in people with dyslexia, a disorder that affects the reading ability of millions of American school children and adults. While it has been commonly believed that only the language-related areas of the brain are affected in dyslexia, this study adds to the growing body of research pointing to dysfunction of another portion of the brain known as V5/MT.