幼児期の身体動揺に視覚が及ぼす影響の動揺方向による差異

Abstract

The purpose of this study was to clarify the difference of visual influences on lateral and fore-aft body sway in pre-school children. The subjects were 67 children aged 3 to 6 years and 50 adults. Body sway was measured on a force platform in the Romberg position with the eyes open or shut. The RMS value for 512 points of A/D converted data at 50 msec intervals was calculated as an index of magnitude for each of the 2 types of directional sway.(1) The RMS value of lateral sway was significantly higher with the eyes shut than with the the eyes open in 5-and 6-year-old children. The RMS value of fore-aft sway with the eyes open or shut did not differ obviously in the children tested. In adult subjects, the visual conditions had a great influence on both sway directions. The RMS value was significantly higher with the eyes shut.(2) It was also found that under both visual conditions lateral sway showed a definite decrease with age, whereas fore-aft sway did not decrease in preschool children.