Sacrum The number of sacral vertebrae varies slightly. For instance, the S1S5 vertebrae of a horse will fuse, the S1S3 of a dog will fuse, and four pelvic vertebrae of a rat will fuse between the lumbar and the caudal vertebrae of its tail. The "Stegosaurus" dinosaur had a greatly enlarged neural canal in the sacrum, characterized as a "posterior brain case”. The sacrum is a complex structure providing support for the spine and accommodation for the spinal nerves. It also articulates with the hip bones. The sacrum has a base, an apex, and three surfaces – a pelvic, dorsal and
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