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KMID : 0365819670070020037
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Journal of Pusan Medical College
1967 Volume.7 No. 2 p.37 ~ p.47
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The Anthropological Study on the Vertebral Column and the Bones of Extremities in Korean Infants
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Abstract
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The author has observed the growth of the bones of extremities and vertebral column in 107 Korean infants (45 male, 62 female).
The results are as follows.
1. During the period of infancy, the growth of vertebral column and the bones of extremities revealed relatively uniform growth and no remarkable differences between both sexes.
2. During the infancy, the ratio of the length of the cervical, thoracic and lumbar vertebrae are 22.4?24.2%, 46.6?50.1% and 26.4?30.4% respectively.
3. During the infancy, the ratio of length of the humerus and radius to that of the presacral division of the vertebral column are 39.6?46.0% and 29.9?35.2% respectively.
4. During the infancy, the ratio of length of the femur and tibia to that of the presacral division of vertebral column are 49. ?359.0% and 41.4?49.5% respectively.
5. During infancy, the ratio of each part of vertebral column and the bones of extremities to the height are as follows: Cervical part is 8.1?9. 1%, thoracic part is 17.4?20. 0%, lumbar part is 10.0?11.4%,presacral division of vertebral column is 35. 5?40.0%, humerus is 15.4?17.3%, radius is 11.6?13.1%, femur is 19.4?21.9%,tibia is 16.1?18.2%,and the bones of lower extremities is 35.0?40. 0%.
6. The ratio of the length-of cervical vertebrae to that of the presacral division of vertebral column is higher in the infants than in fetus, and about the same as in the adults. The ratio of the length of thoracic vertebrae to the length of the presacral division of vertebral column is gradually lower in the infants than in fetus, but higher in the infants than in adults, and the ratio of the length of lumbar vertebrae to the length of the presacral division is almost the same in the infants as in the fetus but lower in the infants than in adults.
7. The ratio of humerus and radius to that of the length of the presacral division of vertebral
column is higher in the fetus than in the infants.
8. The ratio of the femur and tibia to that of the length of the presacral division of vertebral column is almost the same in the infants and fetus.
9. The ratio of the cervical vertebrae to the height is higher in the infants than in the fetus, but those of thoracic and lumbar vertebrae to the height are almost the same in the infants and in fetus
10. No remarkable differences have been observed in the ratio of humerus and the radius to that of the height, but the ratio of femur and the tibia to that of the height is somewhat higher in the infants than in the fetus.
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