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Variation in pelvic morphology may prevent the identification of anterior pelvic tilt

Preece, S, Willan, P, Nester, CJ, Graham-Smith, P, Herrington, LC and Bowker, P 2008, 'Variation in pelvic morphology may prevent the identification of anterior pelvic tilt' , Journal of Manual and Manipulative Therapy (16) , pp. 113-117.

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    Abstract

    Pelvic tilt is often quantified using the angle between the horizontal and a line connecting the anterior superior iliac spine (ASIS) and the posterior superior iliac spine (PSIS). Although this angle is determined by the balance of muscular and ligamentous forces acting between the pelvis and adjacent segments, it could also be influenced by variations in pelvic morphology. The primary objective of this anatomical study was to establish how such variation may affect the ASIS-PSIS measure of pelvic tilt. In addition, we also investigated how variability in pelvic landmarks may influence measures of innominate rotational asymmetry and measures of pelvic height. Thirty cadaver pelves were used for the study. Each specimen was positioned in a fixed anatomical reference position and the angle between the ASIS and PSIS measured bilaterally. In addition, side-to-side differences in the height of the innominate bone were recorded. The study found a range of values for the ASIS-PSIS of 0–23 degrees, with a mean of 13 and standard deviation of 5 degrees. Asymmetry of pelvic landmarks resulted in side-to-side differences of up to 11 degrees in ASISPSIS tilt and 16 millimeters in innominate height. These results suggest that variations in pelvic morphology may significantly influence measures of pelvic tilt and innominate rotational asymmetry.

    Item Type: Article
    Uncontrolled Keywords: Pelvic Bones, Pelvic Tilt, Pelvimetry, Posture.
    Themes: Subjects / Themes > R Medicine > RZ Other systems of medicine
    Health and Wellbeing
    Schools: Colleges and Schools > College of Health & Social Care > School of Health Sciences > Centre for Health Sciences Research
    Colleges and Schools > College of Health & Social Care
    Colleges and Schools > College of Health & Social Care > School of Health Sciences
    Journal or Publication Title: Journal of Manual and Manipulative Therapy
    Publisher: Journal of Manual and Manipulative Therapy Inc
    Refereed: Yes
    ISSN: 1066-9817
    Depositing User: SJ Preece
    Date Deposited: 21 Dec 2010 10:24
    Last Modified: 10 Jul 2014 12:31
    URI: http://usir.salford.ac.uk/id/eprint/12570

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