Non‐circular geometry and radiogrammetry of the second metacarpal

Wiley - Tập 97 Số 3 - Trang 323-327 - 1995
Richard A. Lazenby1
1Anthropology Programme, University of Northern British Columbia, Prince George, B.C. V2N 4Z9, Canada

Tóm tắt

AbstractTraditional radiogrammetry of the second metacarpal mid‐shaft reconstructs cortical cross‐sectional geometry from mediolateral (ML) linear dimensions based on a circular model. However, comparison of antero‐posterior (AP) versus mediolateral radiographic dimensions in a sample of paired metacarpals shows that AP total and medullary widths typically exceed ML widths by 5% to 10%. As well, in 13% of males and 25% of females, the two metacarpals are dissimilarly shaped, i.e., the AP/ML ratio is >1.0 for one side and <1.0 for the other. This situation exaggerates the differences in geometric properties between sides and constitutes a potentially significant source of bias for analyses of bilateral asymmetry. These results suggest that the circular model is inappropriate for estimation of cross‐sectional geometry at this anatomical location. © 1995 Wiley‐Liss, Inc.

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Tài liệu tham khảo

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Wiley

Tập 97 Số 3

323-327

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