ATLANT, (atlas) after the name of the titan Atlanta (Atlas), according to the Greek. mythology, supporting the vault of heaven on its shoulders, the first cervical vertebra of terrestrial vertebrates, which articulates with the skull. In amphibians, it has a typical vertebral structure; in amniotes, it takes the form of a ring. The main part of the body of Atlas (atlant), the pleurocenter, is included in the epistrophe. The atlanto-occipital joint allows movement in the main. in vertical planes.