posterior tubercle

The cervical vertebra represents a remarkable example of anatomical engineering, combining mobility with structural integrity and neural protection. From the superior view, these vertebrae display unique features that distinguish them from other spinal segments. Understanding the intricate anatomy of cervical vertebrae is crucial for medical professionals involved in diagnosing and treating cervical spine conditions.

The CT scan image displays an axial view of the first cervical vertebra (C1), also known as the atlas, with a notable unfused posterior arch highlighted by the red arrow. This congenital anomaly represents a failure of proper fusion during embryonic development of the posterior neural arch components.