The Nature and Control of Postural Adaptations of Boys with and Without Developmental Coordination Disorder

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Eryk P. Przysucha University of Alberta

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M. Jane Taylor Lakehead University

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Douglas Weber University of Pittsburgh

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This study compared the nature of postural adaptations and control tendencies, between 7 (n = 9) and 11-year-old boys (n = 10) with Developmental Coordination Disorder (DCD) and age-matched, younger (n = 10) and older (n = 9) peers in a leaning task. Examination of anterior-posterior, medio-lateral, maximum and mean area of sway, and path length revealed one significant interaction as older, unaffected boys swayed more than all other groups (p < .01). As a group, boys with DCD displayed smaller anterior-posterior (p < .01) and area of sway (p < .01). Analysis of relative time spent in the corrective phase (p < .002) revealed that boys with DCD spent 54% under feedback control while boys without DCD spent 78%. This was attributed to reduced proprioceptive sensitivity, as confirmed by significant differences between the groups (p < .009) in spectral analysis of peak frequency of sway.

Eryk P. Przysucha is now with the School of Kinesiology, Lakehead University, Thunder Bay, Ontario. E-mail: eprzysuc@lakehead.edu. M. Jane Taylor is with the School of Kinesiology at Lakehead University in Thunder Bay, Ontario, Canada. E-mail: jane.taylor@lakeheadu.ca. Douglas Weber is with the Department of Physical Medicine & Rehabilitation at the University of Pittsburgh, Pittsburgh, PA. E-mail: djw50@pitt.edu.

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