Pelvis Ligaments Sacrospinous ligament骶棘韧带 Extend from the lateral border of the sacrum and coccyx to the spine of the ischium 2. Sacrotuberous ligament骶结节韧带 Extend from the posterior aspect of the lower 3 sacral vertebrae to the ischial tuberosityPelvis ▪ Ligaments 1. Sacrospinous ligament 骶棘韧带 Extend from the lateral border of the sacrum and coccyx to the spine of the ischium 2. Sacrotuberous ligament 骶结节韧带 Extend from the posterior aspect of the lower 3 sacral vertebrae to the ischial tuberosity