Posterior arch

Definition

The posterior arch is a bony structure in each vertebra of the spine that, along with the vertebral body, encloses the vertebral foramen. It forms part of the canal through which the spinal cord passes.

Related terms

Vertebral Foramen:

It is an opening in each vertebra that allows for the passage of the spinal cord.

Spinal Cord:

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down through the vertebral canal to the lower back.

Vertebrae:

The individual bones that stack together to form the vertebral column or spine