What Is the Sacroiliac Joint?
Sacroiliac Joint is the connection between the sacrum at the base of the spine and the ilium of the pelvis. Each person has a joint on both sides of the sacrum. Strong ligaments support these joints, which transfer forces between the upper body and legs during standing, walking, and other movements.
Quick Facts About Sacroiliac Joint
Category
Pelvic joint
Used for
Assessing lower back and pelvic movement
Common confusion
Not the same as the hip joint
Also called
SI Joint, sacroiliac articulation
Often discussed with
Back Pain Treatment
Key Takeaways About Sacroiliac Joint
- The sacrum meets the pelvic bones at paired joints.
- Ligaments provide most of the joint’s support.
- Sacroiliac joint symptoms can resemble low back or hip pain.
How Sacroiliac Joint Works
Sacroiliac Joint function depends on the fit between the sacrum and the pelvic bones, along with support from surrounding ligaments and muscles. The joints allow limited movement that helps the pelvis absorb and transfer forces as you change position. Their role is mainly stability, not broad motion.
Related glossary terms: Lumbar Spine, Pelvic Tilt, Facet Joint.
A clinician may examine the sacroiliac region by reviewing symptoms, observing posture, and comparing movement on both sides. The assessment may also consider the lumbar spine and hip joint, because discomfort in these areas can feel similar. A finding near the sacroiliac joint does not identify the source of pain by itself.
From the Arrowhead Clinic Chiropractor Garden City team
When we assess the sacroiliac region during Back Pain Treatment, we review movement, posture, and the surrounding lumbar and pelvic areas. We also consider whether symptoms may come from another nearby structure. This broader check helps us keep the joint finding connected to the person’s overall movement pattern.
Sacroiliac Joint in Practice: A Real-World Example
A person may feel pain near one side of the low back after lifting, turning, or standing unevenly. During Back Pain Treatment, the sacroiliac region is considered along with the lumbar spine, hips, and nearby muscles.
Related Services
Related Terms
Lumbar Spine
Lumbar Spine is the lower section of the vertebral column between the thoracic spine and pelvis…
Pelvic Tilt
Pelvic Tilt is a change in the position of the pelvis that shifts its front edge…
Facet Joint
A facet joint is a small paired joint at the back of the spine that connects…
Referred Pain
Referred Pain is discomfort felt in an area that differs from the tissue or structure producing…
Arrowhead Clinic Chiropractor Garden City
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