sacroiliacalis

The sacroiliacalis, often referred to as the sacroiliac joint or SI joint, is a crucial anatomical structure in the human body. It is a paired joint located on either side of the sacrum, which is the triangular bone at the base of the spine. Each sacroiliac joint connects the wing-like ilium bone of the pelvis to the sacrum. These joints are designed for limited motion, primarily serving to transmit forces between the upper body and the legs, and to absorb shock.

The sacroiliac joints are supported by a complex network of strong ligaments. These ligaments provide stability and play a vital role in maintaining pelvic integrity. The joint surfaces are covered with cartilage, and a small amount of synovial fluid is present, allowing for slight gliding movements. Dysfunction of the sacroiliac joint, often termed sacroiliac joint dysfunction or SI joint pain, can arise from various causes. These can include trauma, such as falls or accidents, repetitive stress from certain activities, pregnancy due to hormonal changes and increased weight, and degenerative changes associated with aging.

Symptoms associated with sacroiliac joint dysfunction can vary but commonly include pain in the lower back, buttocks, and sometimes radiating down the leg. The pain may be exacerbated by activities like standing for long periods, climbing stairs, or transitioning from sitting to standing. Diagnosis often involves a combination of physical examination, patient history, and sometimes imaging studies. Treatment approaches depend on the underlying cause and severity of the dysfunction and may include physical therapy, pain medication, injections, or, in rare cases, surgical intervention.