重心計を用いた人体の身体動揺に関する研究
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概要
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In order to observe various factors which influence human body movements, basic studies have been conducted. Subject's fine body movements in the standing posture, on a metal plate which was supported by three points, were amplified and recorded on the X-Y recorder. Area of body movements was measured by the planimeter (raw data). Obtained data was transformed by the following formulae:<BR>_??_<BR>The results obtained are as follows:<BR>(1) A normal distribution in the area of the body sway was determined by measuring body movements of 263 normal subjects. The normal range of body sway was bellow the 70cm<SUP>2</SUP> (consisting of 85.6% of population), the borderline range was 70-85cm<SUP>2</SUP> (5.7%), the abnormal range was above 85cm<SUP>2</SUP> (8.7%).<BR>(2) Average area (raw data) of the body sway was 24.98cm<SUP>2</SUP> for male sujects, and 18.77cm<SUP>2</SUP> for female subjebts (P<0.01). However, the transformed values of both sexes were not found significant.<BR>(3) The areas of body sway in the normal subjects were transformed into logarithms, and it was statistically inferred that both raw data and log. transformed data were normally distributed.<BR>(4) The body movements of 19 healthy college students were measured during the following conditions: i) with the eyes closed, ii) with the eyes open, iii) with earpieces, iv) after body rotation, v) after mental calculation. The body movement was significantly smaller with the eyes open than with the eyes closed.<BR>(5) Comparisons of body movements in blind, deaf and control groups were made. The group was also subgrouped into a child group around 10 years old and a young adult group around 20 years old. Both blind and deaf young adult groups showed significantly larger body sway than the control group. The deaf child group showed less body movement than did the blind and control groups.<BR>(6) Body movements of young adults and the old ages were compared. The older group showed significantly greater body movements than the younger adult group.<BR>(7) Body movement and the results of psychological tests were correlated. Psychological tests used were the Kyushu Medical Inventory, Manifest Anxiety Scale, Selfrating Depression Scale, Cornell Medical Index, Yatabe-Guilford Personality Test, Picture-Frustration Study and Maudsley Personality Inventory. In general the subjects who complained more and were socially less adjusted showed greater body movements, some of which differences were statistically significant.<BR>(8) The relationship between the pattern of microvibration and body movements was not found to be significant.
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