The stability of single and bimanual (i.e., in-phase and antiphase) rhythmic finger movements was studied in 24 children with a developmental coordination disorder (DCD) and 24 matched controls from a dynamic pattern perspective. Stability was assessed by applying perturbations and measuring the time the system needed to return to its initial stability (i.e., the relaxation time). In addition, ...

Individuals with attention deficit hyperactive disorder (ADHD) often have coexisting developmental coordination disorder (DCD). The positive therapeutic effect of methylphenidate on ADHD symptoms is well documented, but its effects on motor coordination are less studied. We assessed the influence of methylphenidate on motor performance in children with comorbid DCD and ADHD. Participants were 3...

The concept of a specific disorder of motor function has been recognized for at least a century, with a gradual increase in awareness of this condition among health professionals and researchers developing over the past 30 years or so. First recognized in DSM-III-R (American Psychiatric Association 1987) as clumsy child syndrome, a number of labels have been applied to the disorder, including d...