sacroiliakson

The sacroiliac joint, often abbreviated as SI joint, is a crucial articulation in the human body. It connects the sacrum, the triangular bone at the base of the spine, to the ilium, the large, wing-shaped bones of the pelvis. There are two sacroiliac joints, one on each side of the sacrum. These joints are characterized by their strong ligaments, which provide stability and limit excessive movement.

The primary function of the SI joints is to absorb shock and transfer weight from the upper body to the lower extremities. They play a vital role in walking, standing, and other weight-bearing activities. While the SI joints are not designed for significant motion, they do allow for a small degree of gliding and rotation. This subtle movement is essential for the mechanics of gait and pelvic function.

Dysfunction of the sacroiliac joint, commonly referred to as sacroiliac joint dysfunction or SI joint pain, can arise from various causes. These include trauma, arthritis, pregnancy, and differences in leg length. Symptoms typically manifest as pain in the lower back, buttocks, and sometimes radiating down the leg. The pain can vary in intensity and may be exacerbated by certain movements or prolonged positions. Diagnosis often involves a physical examination, imaging studies such as X-rays or MRI, and sometimes diagnostic injections. Treatment strategies aim to reduce pain and inflammation and may include physical therapy, medication, and in some cases, minimally invasive procedures.