The sacroiliac joint (SIJ) plays a crucial role in connecting the spine to the pelvis, yet its movements and mechanics remain a topic of debate and investigation. Pedersen's 1991 literature review offers a comprehensive look at the research available at the time, shedding light on how this joint functions and why understanding its motion matters. This post unpacks key findings from Pedersen’s review, helping readers grasp the complexities of the SIJ and its impact on movement

The sacrum plays a crucial role in maintaining pelvic stability, and its movement under load can reveal important biomechanical differences. Research by McKnight in 2000 focused on sacral load displacement in subjects classified as SOT Category 2, compared to those outside this category. This study offers valuable insights into how pelvic instability manifests and how it may affect overall biomechanics. What Is Sacral Load Displacement? Sacral load displacement refers to the

What Murphy, Dawson & Slack (1995) Found Can adjusting the sacroiliac (SI) joint influence spinal cord reflex activity? In a 1995 study published in Electromyography and Clinical Neurophysiology , Murphy, Dawson, and Slack investigated whether sacroiliac joint manipulation alters the H-reflex , an objective neurophysiological measure of spinal motor neuron excitability. Their findings suggest that manual therapy at the SI joint may produce measurable changes in spinal reflex

Insights from Indahl et al. (1999) The sacroiliac (SI) joint is often discussed as a source of low back pain — but does it also play an active role in neuromuscular control? A pivotal animal study by Indahl, Kaigle, Reikeras, and Holm, published in the Journal of Spinal Disorders , investigated whether stimulation of the sacroiliac joint could trigger muscular activation in the trunk and hip. Their findings suggest the SI joint is not just a passive structure — it may be part