Anatomical Features of the Seventh Cervical Vertebra

Introduction

The seventh cervical vertebra (C7), also known as the vertebra prominens, is distinguished by its unique anatomical characteristics. It serves as a crucial structural element in the cervical spine, providing support and articulation for movement.

Structural Characteristics

Prominent Spinous Process

The C7 vertebra is easily identifiable due to its long, non-bifid spinous process, which is the most prominent among cervical vertebrae.

Transverse Foramen Variation

Unlike other cervical vertebrae, C7 may exhibit a smaller transverse foramen, often unable to accommodate the vertebral artery.

Articulations and Connections

Adjacent Vertebral Articulations

• Superiorly: Articulates with C6 via intervertebral discs and facet joints.
• Inferiorly: Connects to the first thoracic vertebra (T1).

Ligamentous Attachments

C7 serves as an anchor point for several ligaments, including the nuchal ligament, which stabilizes neck movements.

Clinical Significance

Due to its prominence, C7 is often palpated for spinal assessments. Pathologies such as degenerative disc disease or nerve compression at C7 can result in motor and sensory deficits in the upper limb.