Sacrum bodies are seen to be united at their circumferences by bone, wide intervals being left centrally, which, in the fresh state, are filled by the intervertebral discs. The dorsal surface of the sacrum is convex and narrower than the pelvic surface. In the middle line is the median sacral crest, surmounted by three or four tubercles—the rudimentary spinous processes of the upper three or four sacral vertebrae. On either side of the median sacral crest is a shallow sacral groove, which gives origin to the multifidus muscle. The floor of the groove is formed by the united laminae of the
Sacrum bone of Tequixquiac Tequixquiac, which had no purpose but which reflected the ideological sense of the artist who carved the piece of bone from a camelid. This artifact is located in the National Museum of Anthropology in Mexico City. Sacrum bone of Tequixquiac The Sacrum bone of Tequixquiac is an ancient paleo-Indian sculpture carved in a pleistocene-era bone of a prehistoric camel. It was found by Mexican naturalist Mariano Bárcena in 1870. It is considered among the earliest pieces of art from the American continent. A sacrum bone found in Tequixquiac is considered a work of prehistoric art. These people were nomadic, hunting