FRONTAL HAIR DIRECTION IN MENTALLY DEFICIENT INDIVIDUALS

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Abstract
336 mentally deficient individuals, born in Connecticut, U. S. A., and including 66 mongoloids, were examined with regard to the different types of frontal hair slope. The 227 non-mongoloid white patients showed frequencies of different types similar to those found in normal Norwegians. Sorting according to their ancestry showed higher frequency of type III in individuals of southern European origin and lower in those of eastern European extraction. The American Negroes investigated had a considerably higher frequency of type III than was found in any of the other groups. Among the 66 mongoloids no case of type III was observed, although the expectancy should be 16 or 17 cases.

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