Is Sacroiliac Joint Instability Related to Chronic Pelvic Pain?

What’s This Research About?

Sacroiliac joint instability is one of the possible causes of low back pain and pelvic girdle pain. However, it is difficult to determine true movement of the SI joint.  This study measures movement in the SI joint using Radiostereometric analysis (RSA is considered a highly precise and accurate way to measure joint movement) in patients with severe pelvic girdle pain during the single leg stance test developed by Chamberlain in 1930. Comparisons of SI joint movement are made between the standing and hanging leg.

About The Author


Jenn Pilotti

TITLE: Radiosteriometric analysis of movement in the sacroiliac joint during a single-leg stance in patients with long-lasting pelvic girdle pain


PUBLICATION: Clinical Biomechanics

DATE: 2014

AUTHORS: Thomas J. Kibsgård, Olav Røise, Bengt Sturesson, Stephan M. Röhrl, Britt Stuge

Chamberlain technique: A single leg test that measures pubic displacement as a measure of pelvic stability

Radiostereometric analysis: A special way of creating a stereo image of an area by taking two x-rays of the same area, at the same time

Sacroiliac joint: A synovial joint comprised of the sacrum and the two ilium bones

Theory of force closure: Stability of the SI joint from the muscles, ligaments, and thoracolumbar fascia that support the pelvis*

Theory of form closure: The stability in the SI joint that comes from the self locking mechanisms of the pelvis; the result of the anatomy and shape of the bones that comprise the SI joint

The rest of this article is only available to members. Please…

Log In Become a Member View Full Sample Article

By |2018-07-09T22:03:49-04:00July 10th, 2018|Conditions, Musculoskeletal, Pain|0 Comments

About the Author:

Jenn Pilotti has a BS in exercise physiology from UC Davis. After graduating in 2002, she was hired by the Beach and Tennis Club at Pebble Beach as a full time personal trainer. While there, she had the privilege of working with individuals of all ages, many of whom had aches and pains from a life well led. This piqued her interest in injuries, prevention, and pain. After years of undirected self study (and after leaving the security of a full time position to go out on her own), she enrolled in an online program through AT Still University, eventually acquiring a master's in human movement while working full time. After graduating, she continued to read research and write about its application to her work with clients. She fell in love with yoga in 2004, finally became 200 hour RYT in 2014 after years of workshops and self study (there seems to a theme), and continues to study somatic disciplines. She is DNS exercise trainer certified, FRCms, MovNat level I certified, GMB trainer certified, has taken PRI respiration, myokinematics, impingement and instability, and pelvis restoration, and has read an embarrassing number of books on movement, psychology, and wellness. She has an insatiable curiosity about what makes for a healthy person, physically and mentally, and she finds herself often asking why things work for some and not for others. She strongly believes in the power of knowledge and the power of movement. Learn more about Jenn Pilotti.