What Is the Sacroiliac Joint?
The 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 each side of the sacrum. These joints transfer forces between the trunk and legs and allow small, controlled movements during standing, walking, and changing position.
Quick Facts About Sacroiliac Joint
Category
Pelvic joint
Used for
Assessing spine and pelvic movement
Common confusion
Often confused with lower back pain
Also called
SI Joint, Sacroiliac articulation
Often discussed with
Prenatal Chiropractic Care
Key Takeaways About Sacroiliac Joint
- The joint connects the sacrum with the pelvic ilium.
- Its movement is small but helps transfer force during walking.
- Sacroiliac discomfort is not the same as lumbar spine pain.
How Sacroiliac Joint Works
The Sacroiliac Joint joins the sacrum to the ilium, the broad part of the pelvis. Strong ligaments support the connection, while the joint's limited motion helps the pelvis manage force from the trunk and legs. Movement changes as you walk, stand, sit, or shift your weight.
Related glossary terms: Lumbar Spine, Relaxin Hormone, Range Of Motion.
A chiropractor may assess this area through posture, gait, pelvic motion, and nearby muscle function. The lumbar spine and hips also receive attention because they share movement demands with the sacroiliac joint. During pregnancy, changes linked with the Relaxin hormone can affect ligament flexibility and pelvic movement. Assessment focuses on how these areas work together, not on the joint in isolation.
From the Arrowhead Clinic Chiropractor Marietta team
When we assess the sacroiliac joint during Prenatal Chiropractic Care, we observe pelvic balance, movement, posture, and related muscle tension. We also consider pregnancy-related changes that may alter how the pelvis carries everyday loads. Our findings help us distinguish sacroiliac patterns from concerns arising in the lower back or hips.
Sacroiliac Joint in Practice: A Real-World Example
A pregnant person may notice discomfort near one side of the pelvis while turning in bed or walking. During Prenatal Chiropractic Care, we examine pelvic movement and nearby areas to understand how the sacroiliac joint participates in that pattern.
Related Services
Related Terms
Lumbar Spine
The lumbar spine is the lower section of the spinal column, located between the thoracic spine…
Relaxin Hormone
Relaxin Hormone is a peptide hormone linked with pregnancy and reproductive processes. During pregnancy, the body…
Range Of Motion
Range Of Motion is the extent to which a joint can move through its available directions…
Referred Pain
Referred Pain is pain felt in an area that differs from the tissue or structure causing…
Arrowhead Clinic Chiropractor Marietta
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