Integrative Structural Biomechanical Concepts of Ankylosing Spondylitis

Figure 1

Posterior anatomical relations of the lumbopelvic region. On the left side, the upper window shows the sacroiliac joint (SIJ). The lower window shows how the hip joint is interposed between posterior cross-braced muscles and how the pelvis is stabilized. The right side shows the attachment of the hamstrings (particularly the biceps tendon) to the sacrotuberous ligament. The arrow indicates the long dorsal sacroiliac ligament (LDSIL). Axial myofascial hypertonicity could theoretically exert increased compressional forces on the pelvis, SIJs, and hips. (The original was published as Figure  14.4 in [16], In: A. Vleeming, V. Mooney, R. Stoeckart, eds. Movement, Stability, and Lumbopelvic Pain: Integration of Research and Therapy. Edinburgh, Scotland: Churchill Livingston; 2007 : 205–227, reproduced with permission from Churchill Livingston, Copyright Elsevier, 2011).