Which type of vertebrae is characterized by mammillary processes?

Mammillary processes are specific anatomical features found on the lumbar vertebrae. These small, rounded projections are located on the posterior part of the superior articular processes of the lumbar vertebrae. They serve as attachment points for muscles and ligaments and play a role in the movement and stabilization of the lumbar spine.

The lumbar vertebrae are characterized by their larger size compared to the other types of vertebrae, as they bear more weight due to their position in the lower back. The presence of mammillary processes is a distinguishing feature that helps differentiate lumbar vertebrae from cervical, thoracic, and sacral vertebrae, which do not possess this specific structure in the same manner.