part of part of Homo sapiens fused sacrum intermediate sacral crest of sacrum 2026-03-19T00:00:00Z A crest running longitudinally on the posterior surface of the sacrum, medial to the posterior sacral foramina, formed by the fusion of the articular processes of the sacral vertebrae and representing the homologue of the articular pillars seen in lumbar vertebrae. skeletal element projection crest David Osumi-Sutherland