Microscopic Study concerning Hair Form of One Family in the Mixed Blood between European and Ponapean
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概要
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The present article deals with an outline of a microscopic study of hairs of a mixed-blood family between a Ponapean and an Anglo-spanish. The hairs examined were taken from parietal and temporal regions of the head.The microscopic examination revealed a great variety in the hair form of the offspring. Some of the hairs had marrows beyond the classification scheme (1, 2, 3, 4, 5, 6, 7, & 8), some had bamboo-shaped nodes, and some had the pigment in striped patterns. It seems that these variations are caused by the mixture in the offspring of different modes of hair and pigment formation and of difference in the shape of the cross-section of the hair.In the present mixed-blood family, the hair of the husband belonged to the 32 variation-types while that of the wife to the 24 variation-types. The hairs of the offspring were found to belong from the 6 to the 61 variation-types. The twist-knot of the hair was observed in 42.2% of the husband's hair and in 13% of the wife's. In the offspring, the maximum frequency of the twist-knot hair was 57.5% and the minimum was 3.6%.The hairs which are classified as straight with unaided-eyes were found to have about 19% of twist-knot hair by microscopic examinations. The following is a table which shows the classification of hair forms with unaided-eyes and the frequency of twist-knot hairs in each of the classes.Hair form Frequency of twist-knot hairs (%)The table suggests that the twist-knots are one of the causes to produce the wavy hair. Some of the twisting are abrupt and others are gradual. In many of the abrupt twist, swellings in the nodes were observed. In cases when a single hair was composed of several branches, twists were sometimes observed only in one or some of the branches. The examination showed that the twist-knot of this kind was not artificial but natural, possibly hereditary.Although there are yet many things to be re-examined, such as the process of the hair formation and growth and the relation between the age and the hair form, . the present study suggested that the process of pigment formation had a great influence on the hair form.
- 日本人類学会の論文
日本人類学会 | 論文
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