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Directional bilateral asymmetry in human sacral morphology

✍ Scribed by Jeffrey H. Plochocki

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
85 KB
Volume
12
Category
Article
ISSN
1047-482X

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✦ Synopsis

Abstract

Directional bilateral asymmetries in human gross skeletal morphology are largely attributable to differential mechanical loading from handedness during endochondral bone growth. While much has been done in the way of identifying directional asymmetries of the upper limb in relation to handedness, comparatively little research has focused on asymmetry in the lower body. The present paper analyses asymmetry in the human sacrum in a sample of 238 modern individuals. Measurements of right and left sides of the lateral and posterior breadths of the alae and the maximum height of the auricular surface were used. Asymmetry was calculated as: [(left side βˆ’ right side) Γ· right side] * 100. Directional asymmetry was identified using a one‐sample t‐test against a hypothesized mean of zero. Significant directional asymmetry (P < 0.05) was found in all three dimensions. The pattern of asymmetry is consistent with models describing the influence of right‐handedness on the lower body, which predicts that left side dimensions will be larger. Copyright Β© 2002 John Wiley & Sons, Ltd.

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