Understanding Zygapophyses and Their Role in Spinal Health

Zygapophyses (singular: zygapophysis) are small bony projections that are found on the posterior elements of vertebrae in the spine. They are located on either side of the pedicle, a bony projection that extends from the body of the vertebra into the neural canal.

The zygapophyses serve as attachment points for muscles and ligaments that help to stabilize the spine and maintain proper posture. They also provide a point of attachment for the intervertebral discs, which act as shock absorbers between the vertebrae.

In some cases, the zygapophyses can become inflamed or irritated, leading to conditions such as zygapophyseal joint inflammation (ZJI) or facet joint osteoarthritis. These conditions can cause pain and stiffness in the neck or back, and may be treated with physical therapy, medication, or surgery.