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Morphometric affinities of the human shoulder.

C E Oxnard

    American Journal of Physical Anthropology
    |March 1, 1977
    PubMed
    Summary

    Multivariate morphometric studies of primate shoulder shape are re-evaluated. Previous interpretations are challenged regarding size correction, with this study refuting claims of misinterpretation and demonstrating closer replication of earlier findings than suggested.

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    Area of Science:

    • Primate anatomy
    • Paleoanthropology
    • Biomechanics

    Background:

    • Multivariate morphometric studies of primate shoulder morphology have been subject to debate.
    • Previous analyses by Oxnard (1973) were questioned by Corruccini and Ciochon (1976) regarding size correction.

    Purpose of the Study:

    • To re-evaluate the interpretation of multivariate morphometric studies of the primate shoulder.
    • To address claims that previous analyses were misinterpreted due to inadequate size correction.
    • To clarify the relationship between Corruccini and Ciochon's findings and earlier research.

    Main Methods:

    • Re-examination of the full range of genera included in earlier multivariate morphometric studies of the shoulder.
    • Comparison of results from different size correction methods, including those used by Corruccini and Ciochon (1976) and Oxnard (1973).
    • Analysis of "residual" shoulder dimensions versus broader studies incorporating more shape information.

    Main Results:

    • The suggestion that earlier multivariate morphometric studies of the shoulder were misinterpreted due to size correction is refuted when considering the full range of genera.
    • Corruccini and Ciochon's main result closely replicates a more restricted part of the earlier study not highlighted by them.
    • The primary difference in results stems from the scope of data included (residual dimensions vs. broader shape information), not multivariate manipulation.

    Conclusions:

    • The re-evaluation supports the validity of earlier multivariate morphometric analyses of primate shoulder morphology.
    • The contribution of Corruccini and Ciochon's discussion is clarified by understanding the scope of their analysis versus prior broader studies.
    • Accurate assessment of primate shoulder evolution requires comprehensive consideration of morphological data.

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