Comorbidity of ADHD and dyslexia.

Comorbidity of attention deficit hyperactivity disorder (ADHD) and reading disorder (RD) is frequent. Comorbid subjects show a neuropsychological profile characterized by failure of various cognitive functions with an additive-effect that can determine more severe functional deficits. Comorbid RD may be a marker for a group of children with ADHD with more severe cognitive deficits, and a worse neuropsychological, academic, and behavioral outcome. The article focuses on the link between RD and ADHD from an epidemiological, genetic, neurofunctional, neuropsychological, and therapeutic perspective and summarizes the characteristics of the comorbid phenotype.