Because of the tendency of one sacroiliac joint (SIJ) to compensate for the other when motion is dysfunctional, typically both SIJs become dysfunctional.
The sacroiliac joint is unique in that it is a transitional joint between the sacrum of the spine and the ilium of the pelvic bone of the lower extremity.
Assessment/diagnosis of spinal joint dysfunction, whether it is a hypomobility or a hypermobility, is done via motion palpation.
Could it be that longus muscles act as length-variable sensors, contributing to stability and adaptability, via their rich mechanoreceptor capabilities…
5 Pilates Mat Abdominal Series exercises: Single Leg Stretch, Double Leg Stretch, Single Straight Leg Stretch, Double Straight Leg Stretch, & Criss-Cross.