The
sacrum connects to the pelvic bones and the lumbar spine and is stabilized by a strong network of ligaments. The primary ligaments supporting the sacrum and sacroiliac (SI) joint include:
- Sacrotuberous ligament
- Sacrospinous ligament
- Iliolumbar ligament
These ligaments play a crucial role in maintaining pelvic stability and load transfer between the spine and lower extremities.
Why Ligament-Related Sacral Pain Can PersistA key characteristic of the pelvic and sacral ligaments is their
limited blood supply. Because of this, ligament strains or sprains in the pelvic region tend to heal slowly and may cause persistent, dull aching pain in the sacral or SI joint area.
However, primary sacral ligament injury is relatively uncommon. In most cases,
ligament pain develops secondary to chronic muscular dysfunction, particularly when multiple myofascial trigger points are present in the surrounding muscles.