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  • Title: Differences in motor imagery between children with developmental coordination disorder with and without the combined type of ADHD.
    Author: Lewis M, Vance A, Maruff P, Wilson P, Cairney S.
    Journal: Dev Med Child Neurol; 2008 Aug; 50(8):608-12. PubMed ID: 18754899.
    Abstract:
    It has been proposed, and questioned, whether motor impairments in attention-deficit-hyperactivity disorder, combined type (ADHD-C) alone, developmental coordination disorder (DCD) alone, and ADHD-C and comorbid DCD (ADHD-C/DCD) may arise from disruption to a common set of cognitive functions and their related neural substrate. This study examined movement durations for real and imagined movements in a visually guided pointing task in 58 prepubertal children aged 8 to 12 years old with ADHD-C alone (n=14), ADHD-C/DCD (n=14), DCD alone (n=15), and an age-, sex-, and Full-scale IQ-matched healthy comparison group (n=15). There were 10 males and 4 or 5 females in each group. The DCD alone group demonstrated an inability to generate imagined movements that was not present in the ADHD-C group, with or without comorbid DCD, or healthy comparison participants. These findings add to the emerging literature characterizing intended and actual motor impairments associated with DCD alone.
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