Postural control in strabismic children versus non strabismic age-matched children

Lions, Cynthia; Bui-Quoc, Emmanuel; Bucci, Maria
September 2013
Graefe's Archive of Clinical & Experimental Ophthalmology;Sep2013, Vol. 251 Issue 9, p2219
Academic Journal
Background: Several studies have shown that achieving a dual task modifies postural control; however, their results are conflicting. The goal of the present study is to compare the effect of a simple task (eye fixation) to the effect of a dual task (saccadic eye movements) on postural balance in strabismic and in non strabismic children. Methods: Postural stability was recorded with a platform (Techno Concept©) in ten strabismic children aged from 5.4 to 13.8 years (mean age: 8.8 ± 2.5 years). Data were compared to that of ten age-matched non strabismic control children. We analyzed the surface area, the length and the mean speed of the center of pressure (CoP). Results: Strabismic children are more instable than control children. The surface (340 mm), the length (402 mm) and the mean speed (16 mm/s) of the CoP are significantly higher in strabismic children than in control children (160 mm, 280 mm and 11 mm/s, respectively). In addition, both strabismic and control children have a better postural control during saccades than during a fixation task. Surface, length and mean speed of the CoP are significantly reduced during the saccade task (214 mm, 306 mm and 12.5 mm/s, respectively) than during the fixation task (285 mm, 376 mm and 14.8 mm/s, respectively). Conclusions: Abnormal postural control in strabismic children could be due to their visual deficits. The postural improvement observed in a dual task (saccades) vs. a simple task (fixation) might be due to the fact that postural control becomes more automatic during saccadic eye movements.


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