Studies on the Standing Posture of 3 Year Old Children by Electrogravitiogram

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  • 3才児の重心動揺に関する研究
  • 3サイジ ノ ジュウシン ドウヨウ ニカンスルケンキュウ

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The movement of the point of the gravity (Electrogravitiogram, EGG) on both feet for 20 seconds of 1738 boys and girls was measured by a gravicorder (Anima Type G 1800) at the health examination for 3 year old children (at M-Health Center) in Nagoya City in November 1977 to in October 1978, <br>The results obtained in the study are as follows;<br>1) The percentage of achievement on the test is higher in girls than in boys.<br>2) The average area of EGG for boys are 16.2cm2(eyer open) and 25.8cm2(eyes closed), and that for girls are 15.3cm2(eyes open) and 21.2cm2(eyes closed). The average length of EGG for boys are 52.8cm(eyes open) and 83.7cm(eyes closed), and that for girls are 51.5cm(eyes open) and 71.0cm(eyes closed).<br>There was significant defference between boys and girls both in the area and the length of EGG.<br>3) Almost every area and length of EGG scattered along the logarithmic normal curve.<br>4) The area and length of EGG were increased by eyes closure in all children. The area of EGG at eyes closed status is 1.7 times as wide as that of eyes open status. The length of EGG at eyes closed status is 1.5 times as long as that eyes open status.

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