AbstractThe concept of atypical brain development was in-troduced by Gilger and Kaplan in 2001 to describe develop-mental variation in brain functions and to account for the high degree of comorbidity among neurodevelopmental disorders.
Developmental coordination disorder (DCD) is a common neurodevelopmental disorder affecting around 5–6%of school-aged children. It is phenotypically heterogeneous, with up to 70 % of children meeting criteria for at least one other neuro developmental disorder. Recent genetic evidence has found that the same genes are implicated in various neurodevelopmental disorders, including DCD, attention def-icit hyperactivity disorder (ADHD), and autism spectrum dis-order, and that these genes play a significant role in brain development. Imaging research has revealed that children with DCD display alterations in brain structure and function and that some of these alterations overlap with those that have been found children with ADHD, whereas others are unique to children who display DCD. Emerging genetic and imaging evidence supports the contention that DCD, which is associated with impairments in motor functioning, behavior, and other neuro psychological functions (e.g., visual percep-tion, executive functioning), is due to atypical brain develop-ment. Future research is needed to help clarify the alterations in brain structure and function associated with this disorder and to examine etiological factors (e.g., genetics, teratogens, nutrition, very low birth weight) that place children at risk for DCD. KeywordsAtypical brain development. Developmental coordination disorder.DCD.Comorbidity. Genetics. Neuroimaging.Brain structure.Brain function