Abstract
Extract: In previous reports the subclassifications for the terminations of the G line of the palm and for the interdigital palmar areas have been described. These subclassifications, as well as those of Cummins and Midlo for the hypothenar and thenar/I areas, were applied to anthropologic data and showed strong bilateral and racial polymorphism. The present study is an effort to determine the usefulness of these methods in investigations of clinical data. A well defined anomaly, Down's syndrome, which has known dermatoglyphic peculiarities, was chosen for this test. The study involved 145 male and 120 female patients and 108 male and 114 female control subjects. All subjects were unrelated Caucasians. Significant differences between the patient and control subjects were encountered in the subclassifications of the C line terminations and in the hypothenar area patterns. Significant differences were observed in the frequency of patterns in the thenar/I area as well as the expected differences in the simial lines. Sydney line frequencies showed no significant differences. Speculation: The results of the present study suggest that the subclassifications of the palmar patterns and the G line terminations are of value in the investigation of clinical data by offering further diagnostic criteria not revealed by gross dermatoglyphic evaluation.
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