Preece Stephen J, Willan Peter, Nester Chris J, Graham-Smith Philip, Herrington Lee, Bowker Peter
Research Fellow, Centre for Rehabilitation and Human Performance, University of Salford, Manchester, UK.
J Man Manip Ther. 2008;16(2):113-7. doi: 10.1179/106698108790818459.
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 ASIS-PSIS 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.
骨盆倾斜度通常通过水平与连接髂前上棘（ASIS）和髂后上棘（PSIS）的直线之间的夹角来量化。尽管这个角度由骨盆与相邻节段之间作用的肌肉和韧带力量的平衡所决定，但它也可能受到骨盆形态变化的影响。这项解剖学研究的主要目的是确定这种变化如何影响骨盆倾斜度的ASIS-PSIS测量值。此外，我们还研究了骨盆标志点的变异性如何影响无名骨旋转不对称的测量值和骨盆高度的测量值。本研究使用了30具尸体骨盆。每个标本都被放置在固定的解剖学参考位置，并双侧测量ASIS和PSIS之间的角度。此外，还记录了无名骨高度的左右差异。研究发现ASIS-PSIS的角度范围为0至23度，平均值为13度，标准差为5度。骨盆标志点的不对称导致ASIS-PSIS倾斜度的左右差异高达11度，无名骨高度的左右差异高达16毫米。这些结果表明，骨盆形态的变化可能会显著影响骨盆倾斜度和无名骨旋转不对称的测量值。
