著者

渡辺 鑑江

出版者

The Japanese Society of Health and Human Ecology

雑誌

民族衛生 (ISSN:03689395)

巻号頁・発行日

vol.27, no.2, pp.130-158,A7, 1961 (Released:2010-11-19)

参考文献数

38

被引用文献数

1

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Female pelvis, as the most important part of maternity, has repeatedly studied not only in Japan but in foreign countries, but few with the research from the point of view of relative growth throughout thewhole ages till maturity. This study of 1543 normal pelvis, sampled at random by sex, year-age (month-age in infancy), through the ages between 1 month and 17 years, was attempted to clarify the developmental changes of pelvic cavity by means of stochastical analysis on the radiographic measurements.The results obtained are as follows.(1) The pelvic cavity was found to become larger with the age advanced, and to show a particularly rapid. growth for three months after birth, between the ages of 1 and 4 years, and also in the puberty.(2) Sexual differences of pelvic cavity were observed already in the infancy, that is, the upper structure in males and the lower structure in females were greater than those in opposite sex. After 10 years old, the growth of pelvic cavity in females was remarkable and in the puberty every parts of the cavity measured in females was greater than that in males.(3) The investigation on relative growth between each parts of the pelvic cavity measuied in this study revealed that in the early infancy the maximum distance between both obturator-foramina increased most rapidly while the distance of Wollenberg's Y-cartilage-line did eminently in the later infancy and also in the puberty. The growth of breadth of the cavity was superior to that of the height in the infancy, while after that the latter became superior to the former ; in the puberty the both were almost of the same increase from the point of view of relative growth.(4) The growth of the pelvic cavity had so close relationship to that of the pelvis that the coefficients of correlation between them gave very high possitive values.

著者

堀田 之 大橋 邦和 中尾 初生 渡辺 鑑江 久世 妙子 浅木森 利昭

出版者

The Japanese Society of Health and Human Ecology

雑誌

民族衛生 (ISSN:03689395)

巻号頁・発行日

vol.27, no.3, pp.193-197,A11, 1961 (Released:2010-11-19)

参考文献数

15

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This study of 1230 infants and newborns was undertaken to realize the development of motor activity. Followings are the results obtained.(1) The percentage of the infants who had acquired the activity arised with the monthage advanced, increasing its value rapidly near the point at which median infants had acquired the activity. And it became a slow increase after that point, showing this tendency more obviously in the higher stages of motor development.(2) The harder became the behavior to achieve, the longer were needed the periods during which the percentage of the infants who had acquired the activity came to 100% from 50%, for there were the infants who acquired the activity extremely late for their chronological age. This fact suggests that the motor development is affected by the physical and environmental components.(3) No remarkable differences were observed in the period at which 50% of the infants had acquired the activity comparing with the pre-war babies.(4) No sexual differences were observed in the period at which 50% of the infants had acquired the activity