An Allometric Study on the Peculiarities of Morphological Growths by the Growth Patterns in Height

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  • 身長の発育PATTERN別にみた形態発育の特性について : 相対成長による分析
  • シンチョウ ノ ハツイク PATTERNベツ ニ ミタ ケイタイ ハツイク ノ

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The purpose of this study was to clarify the peculiarities of morphological growths by the allometric analysis. The materials used for this study were the longitudinal data of the height, weight, chest circumference, lower limb length, calf circumference and upper arm circumference of 60 boys whose age ranging from 10 to 14 years old, taken in 1964-68. According to the annual growth rate of the height, the growth patterns were classified into four types (designated as A, B, C and D patterns). The A, B, C and D patterns, correspond to ascending, descending, convex and concave types in the standard score vs. age curves, respectively. The logarithm of mean values of the morphological measurements (log y) were plotted against that of the height (log x). The plotts obtained were approximately linear, i. e., log y = log b + a log x, where a and b are constants. The values of a and log b were determined from the above plotts by the method of least squares. The results obtained were as follows; 1) The A, B and C patterns were diphasic while the D pattern was uniphasic on the weight vs. height curves. There were the following tendencies among the four patterns for the above curves : The boys of the B pattern were more precocious type, while those of D pattern were of later in growth. 2) No significant differences were observed among the four patterns on the lower limb length vs. height curves. However, the B pattern showed smaller a values than others after the critical point. 3) The A, B and C patterns were diphasic on the chest circumference vs. height curvres. The A and C patterns showed discontinuities while the B pattern showed the critical point. The D pattern showed neither critical point nor discontinuity. 4) The A pattern were uniphasic while the B, C and D patterns were diphasic on the calf circumference and the upper arm circumference vs. height curves. The above curves showed heigher value of a than the theoretical value (a=1) for each pattern. For the B and C patterns, however, the values of a for the post-critical point were heigher than those for the previous one.

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