The sacroiliac (SI) joint is a pair of strong, slightly movable joints located in your pelvis. They connect the sacrum (the triangular bone at the base of your spine, above your tailbone) to the ilium (the large, upper part of your hip bone). These joints play a crucial role in supporting the weight of your upper body when you're standing.
SI Joint Anatomy and Function
- Location: The SI joints are found at the back of the pelvis, on either side of the sacrum.
- Connection: They connect the sacrum (lower spine) with the ilium (pelvis).
- Function: The primary function of the SI joints is weight bearing. They transfer weight from your upper body to your legs. They also contribute to stability and movement of the pelvis.
- Limited Movement: While strong, they are not designed for extensive movement; their mobility is primarily in rotation, flexion and extension.
SI Joint Pain and Dysfunction
Pain in the SI joint, often called sacroiliac joint pain, is a common complaint. It can range from mild to severe. The pain typically originates in the lower back and buttocks but can radiate to the thighs, groin, or even the upper back. Several factors can lead to SI joint dysfunction, such as injury, inflammation (sacroiliitis), or arthritis.
SI Joint Treatment
Treatment for SI joint problems varies depending on the underlying cause and severity of the pain. It may include conservative measures such as physical therapy, medication (pain relievers, anti-inflammatories), or injections. In more severe cases, surgery might be considered, such as sacroiliac joint fusion.
Note: Information about specific treatments for SI joint conditions is provided in the provided references but is beyond the scope of this simple explanation.
