Cervical Spine Overview

In vertebrates, cervical vertebrae are those vertebrae immediately behind the skull. In some species, some parts of the skull may be composed of vertebra-like elements, e.g. the occipital bone in humans is composed of four vertebra-like segments. In many vertebrate species, cervical vertebrae are variable in number; however, almost all mammals have seven . The few exceptions include the manatee and the two-toed sloth, which each have only six cervical...