What forms the posterior border of the vertebral foramen?

What forms the posterior border of the vertebral foramen?

• A. Spinous process
• B. Pedicle
• C. Lamina
• D. Body

Answer: (C)

The lamina forms the posterior border of the vertebral foramen. The vertebral foramen sits within the vertebral arch, with the front wall formed by the posterior aspect of the vertebral body (and the intervertebral disc), the sides by the pedicles, and the roof and back boundary completed by the two laminae that meet in the midline. The spinous process projects from this region but does not itself constitute the border of the foramen. In procedures like laminectomy, removing the lamina exposes the spinal canal, underscoring that the lamina defines the posterior boundary.

The lamina forms the posterior border of the vertebral foramen. The vertebral foramen sits within the vertebral arch, with the front wall formed by the posterior aspect of the vertebral body (and the intervertebral disc), the sides by the pedicles, and the roof and back boundary completed by the two laminae that meet in the midline. The spinous process projects from this region but does not itself constitute the border of the foramen. In procedures like laminectomy, removing the lamina exposes the spinal canal, underscoring that the lamina defines the posterior boundary.