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. These joints transfer load between the upper body and legs, support pelvic stability, and allow small movements during walking, bending, and changing position.
Quick Facts About Sacroiliac Joint
Category
Pelvic joint
Used for
Assessing pelvic movement and load transfer
Common confusion
Often confused with the hip joint
Also called
SI joint, sacroiliac articulation
Often discussed with
Back Pain Treatment
Key Takeaways About Sacroiliac Joint
- Two joints connect the sacrum with the pelvic bones.
- The joints support load transfer during walking and bending.
- Sacroiliac joint pain is not the same as hip pain.
How Sacroiliac Joint Works
The sacroiliac joint links the sacrum with the ilium on each side of the pelvis. Strong ligaments help hold each joint in place, while its limited motion helps the pelvis manage forces from the spine and legs. The joint participates in ordinary actions such as walking, standing, bending, and turning.
Related glossary terms: Lumbar Spine, Pelvic Floor, Joint Mobilization.
Clinicians assess the area by reviewing symptoms, observing movement, and checking nearby structures. The lumbar spine, hips, and surrounding muscles can influence how the pelvis moves. Pain felt near the joint may also come from another structure, so location alone does not identify the source.
From the Arrowhead Clinic Chiropractor Savannah team
When we assess the sacroiliac joint during Back Pain Treatment, we review movement in the lower back, pelvis, and hips together. We also consider how posture, walking, and reported symptoms relate to the area. Our findings help guide the type of hands-on care or exercise discussion that fits the examination.
Sacroiliac Joint in Practice: A Real-World Example
A person with back pain may report discomfort near one side of the pelvis after prolonged standing. During an evaluation, we may observe walking and pelvic movement while checking whether the symptoms fit the sacroiliac area or a nearby structure.
Related Services
Related Terms
Lumbar Spine
The lumbar spine is the lower section of the vertebral column, located between the thoracic spine…
Pelvic Floor
Pelvic Floor is a group of muscles and connective tissues that spans the bottom of the…
Joint Mobilization
Joint mobilization is a hands-on manual therapy technique that applies controlled movement to a joint and…
Referred Pain
Referred Pain is a pain pattern felt in an area away from the tissue causing the…
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