Article

Developmental coordination disorder (DCD) is a neurodevelopmental
impairment that affects approximately 6% of children in primary school age.
Children with DCD are characterized by impaired postural control. It has yet to
be determined what effect peripheral and central neuromuscular control has on
their balance control. OBJECTIVE: The aim of this study was to investigate the
underlying mechanisms to impaired postural control in children with DCD using the
rambling-trembling decomposition of the center of pressure (CoP). METHOD: Nine
children with DCD (9.0+/-0.5years, 7 boys, 2 girls) and 10 age- and
gender-matched typically developing children (TD) with normal motor proficiency
(9.1+/-0.4years, 7 boys and 3 girls) performed 3x30s bipedal standing on a force
plate in six sensory conditions following the sensory organization procedure.
Sway length was measured and rambling-trembling decomposition of CoP was
calculated in medio-lateral (ML) and anterior-posterior (AP) direction. RESULTS:
Both rambling and trembling were larger for the children with DCD in AP (p=0.031;
p=0.050) and ML direction (p=0.025; p=0.007), respectively.
ML rambling
trajectories did not differ in any conditions with fixed support surface. In ML
direction children with DCD had a lower relative contribution of rambling to
total sway (p=0.013). CONCLUSION: This study showed that impaired postural
control in children with DCD is associated with less efficient supraspinal
control represented by increased rambling, but also by reduced spinal feedback
control or peripheral control manifested as increased trembling.
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Langue : ANGLAIS