Article

A normal time-course for the acquisition of sitting is essential. A delay in
sitting may affect other developmental milestones, resulting in deficiencies in
overall skill. Therefore, our aim was to identify variables whose measures at the
very beginning of sitting would allow for the projection of the evolution of the
sitting skill. Center of pressure data were collected from the postural sway of
twenty-six typically developing infants while sitting on a force platform with a
beginning ability to sit upright. Spatial, temporal and frequency variables of
postural sway were obtained from both the medial/lateral and anterior/posterior
directions of sway. Discriminant function analysis was conducted to identify
potential predictors of the duration between onset and fully independent sitting.
Gender (p=0.025), median frequency (p=0.006), and correlation dimension (p=0.002)
were identified to be predictive of grouping with 73.1% correct classification of
the participating infants into short, mid, and long delay groups. In conclusion,
measures taken at the earliest stage of sitting may allow the projection of the
time-course to achieve independent sitting for typical infants. This approach may
be useful for monitoring typical development.
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Langue : ANGLAIS