[The phenomenon of debrachycephalization in Jena school children].

Abstract

Head measurements are performed within the anthropological investigations of school children from Jena (Germany) since more than 5 decades (1944-1995). Here we report on secular changes of the head length, the head breadth and the cephalic index. The head circumference, measured in 1985 and in 1995, is included in the analysis. Head length and head breadth show a contrary development over the whole period: the average length of the head increases between the consecutive investigations, whereas the breadth of the head decreases continuously between the separate investigations. As a consequence the cephalic index decreases in boys and girls for about 8 units since 1944. In this way a secular change of the shape of the head in the sense of debrachycephalisation can be proved in Jena school children. The head circumference, however, remains nearly constant between 1985 and 1995. Possible causes of this process of debrachycephalisation are focussed in this article.

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