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
Ver sacrum Ver sacrum Ver sacrum ("sacred spring") is a religious practice of ancient Italic peoples, especially Sabines and their offshoot Samnites, concerning the deduction of colonies. It was of special interest to Georges Dumézil, according to whom the "ver sacrum" perpetuated prehistoric migration practices of Indo-Europeans to the end of the Iron Age and into the beginnings of history, when stable sedentary dwelling conditions had already become general. The practice consisted in a vow "(votum") to the god Mars of the generation of offspring born in the spring of the following year to humans or cattle. Among the Sabines, this was