What type of vertebra is characterized by having a large vertebral foramen and lacking a vertebral body?

The C1 Atlas vertebra is unique among the vertebrae because it lacks a vertebral body and features a large vertebral foramen. This structure is designed to support the skull and allow for the nodding motion of the head. The large vertebral foramen in the atlas accommodates the spinal cord, providing necessary room for neural passages while also contributing to the range of motion in the cervical region.

In contrast, other vertebrae, such as the axis (C2), lumbar, and thoracic vertebrae, all have distinct vertebral bodies which serve to support more weight and stabilize the spine in their respective regions. Each of these types of vertebrae has specific adaptations suited for their functions in the spine, differentiating them from the atlas in both structure and function.