Anatomy · functional reading
Sacrotuberous ligament
The sacrotuberous ligament is a broad ligament connecting the sacrum to the ischial tuberosity and contributing to the posterior mechanical organization of the pelvis.
Scientific basis
The sacrotuberous ligament extends from the sacrum and neighboring structures to the ischial tuberosity. It has close relationships with the sacrospinous ligament, the deep muscles and several fascial structures. The pudendal nerve runs through the region of the ischial spine, in relation to the sacrospinous and sacrotuberous ligaments.
Blue Portance / SBNFA™ reading
In SBNFA™, this ligament is integrated into the analysis of stress transmission between the sacrum, pelvis, ischial tuberosity, hip and soft tissues. The aim is not to consider the ligament on its own, but to understand its role within a mechanical whole.
Contribution to the analysis of sitting
The ischial tuberosity is a major weight-bearing area in the seated position. The proximity of the sacrotuberous ligament to this region therefore justifies looking at how support is distributed and how it changes over time.
Not to be confused with
Sacrospinous ligament, deeper and attached to the ischial spine; ligamentous clamp, the region where the pudendal nerve passes.
Sources and scope
- Robert et al. (2009): relationships of the pudendal nerve with the sacrotuberous ligament
- Robert et al. (1998): anatomical zones of conflict of the pudendal nerve
- Ziouziou et al. (2013): ligamentous clamp and pudendal pathway
- Chikazawa et al. (2026): role of the sacrotuberous ligament in the fascial organization of the pudendal canal
This entry cannot determine the origin of pain.
Further reading
- Learn more — Article: Pudendal Neuralgia: Why Can a Simple Sitting Position Become an Ordeal?
- Go further — Expert guide: Mechanical Vulnerability and Pudendal Nerve Entrapment Mechanisms
