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Genetics of the a‐b ridge count on the human palm

Genetics of the a‐b ridge count on the human palm BY JOSE PONS Catedrcitico de Antropologia, Facultad de Ciencias, Universidad de Oviedo, Oviedo (Spain) In the analysis of the morphology of epidermal ridges the 'deltas ' or 'triradii ' appear as very important elements. A triradius can be defined as the meeting point of three ridges called radiants. On the palm there are normally four triradii, one at the base of each finger, called u, b, c and d, beginning with the one under the index finger, and another triradius known as t near the base of the fourth metacarpal bone or at some point on its axis. The study of the degree of separation between tritadii can supply interesting data on ridge configuration. The number of ridges between two triradii seems a suitable measure of this separation for it is independent of hand size. This is specially important in the present paper which involves parent-child comparisons with significant differences in hand sizes. For this reason, the direct measurement is obviously unsuitable, since it is not easy to find an appropriate correction factor for the varying hand sizes. Further, we must not forget another possible source of error, namely, that due to the variability in pressure and in http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annals of Human Genetics Wiley

Genetics of the a‐b ridge count on the human palm

Annals of Human Genetics , Volume 27 (3) – Mar 1, 1963

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References (6)

Publisher
Wiley
Copyright
Copyright © 1963 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0003-4800
eISSN
1469-1809
DOI
10.1111/j.1469-1809.1963.tb00795.x
Publisher site
See Article on Publisher Site

Abstract

BY JOSE PONS Catedrcitico de Antropologia, Facultad de Ciencias, Universidad de Oviedo, Oviedo (Spain) In the analysis of the morphology of epidermal ridges the 'deltas ' or 'triradii ' appear as very important elements. A triradius can be defined as the meeting point of three ridges called radiants. On the palm there are normally four triradii, one at the base of each finger, called u, b, c and d, beginning with the one under the index finger, and another triradius known as t near the base of the fourth metacarpal bone or at some point on its axis. The study of the degree of separation between tritadii can supply interesting data on ridge configuration. The number of ridges between two triradii seems a suitable measure of this separation for it is independent of hand size. This is specially important in the present paper which involves parent-child comparisons with significant differences in hand sizes. For this reason, the direct measurement is obviously unsuitable, since it is not easy to find an appropriate correction factor for the varying hand sizes. Further, we must not forget another possible source of error, namely, that due to the variability in pressure and in

Journal

Annals of Human GeneticsWiley

Published: Mar 1, 1963

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