International Journal of Human Diversity and Evolution
Coverage: 1923-1941 (Vols. I-XIX) & 1962-2023 (Vols. 1-61)
ISSN 0323-1119 (Print)
ISSN 2570-9127 (Online)
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'Šmahel Z, 1981: Differences Between the Configuration of the Right and Left Plantar Arches. Anthropologie (Brno) 19, 3: 259-262'.
In spite of the fact that the differences in the configuration of the plantar arch between the right and left feet, on the average, are negligible, substantial individual differences may occur even in normal population. The degree of these differences and their variability are most marked when the Chippaux-Šmiřák's index is used for the evaluation, they are less pronounced during the assessment of Schwartz-Clarke's angle, and even smaller during the use of the planimetric index. On the basis of studies of the distribution on of the degree of individual differences in the configuration of the plantar arch between both sides, determined with the three distinct methods as well as of the analysis of pertinent statistical characteristics, it was possible to establish border-line values of the norm, disharmony and dysmorphogenesis between the configuration of the plantar arch on the right and left sides (tab. 2). This provides the possibility to avoid erroneous conclusions during the assessment of the configuration of the plantar arch and of its various disorders. The proportion of disharmony and dysmorphogenesis in our population was expressed in terms of per cent (tab. 3). The differences between both sides confirm the justification of the introduction of intermediary and lowered types of plantar arches, as well as the pertinentranges of values suggested by several authors. The statements discussed are based on the following consideration: If plantography determines that one foot is flat and the other normal, then the difference between both sides should correspond at least to a disharmony. However when the difference is still within the range of normal, the superior shape of the plantar arch should not be designated as normal, since there are no substantial differences between both sides. Therefore it is necessary to define transitory types.

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