part of part of Homo sapiens fused sacrum lateral sacral crest of sacrum 2026-03-19T00:00:00Z A crest running along the lateral aspect of the posterior sacral surface, lateral to the posterior sacral foramina, formed by fusion of the transverse processes of sacral vertebrae and providing attachment for the posterior sacroiliac and sacrotuberous ligaments. skeletal element projection crest David Osumi-Sutherland