Anterior longitudinal ligament

A strong band of connective tissue that helps stabilize the spine and maintain its alignment.

The anterior longitudinal ligament is a fibrous structure that stretches along the front surface of the vertebral column. It runs from the base of the skull to the sacrum, anchoring each vertebra to the next. This ligament is broader in the cervical region and narrows in the lumbar region, playing a crucial role in spinal stability.

Terminologia Anatomica

ligamentum longitudinale anterius

System

Musculoskeletal system

Function

This ligament's primary role is to prevent hyperextension of the spine, which can occur when the back is arched too far backward. By connecting and supporting the vertebrae, the anterior longitudinal ligament helps to maintain proper spinal alignment and posture. Additionally, it plays a significant role in absorbing shock and distributing forces that occur during movement, thus protecting the spinal cord and surrounding nerves. Its strength and elasticity are vital for allowing a range of motion while still limiting excessive motion that could lead to injury.

Location

The anterior longitudinal ligament runs along the anterior (front) portion of the spinal column, extending from the occipital bone at the base of the skull to the anterior surface of the sacrum, the triangular-shaped bone at the base of the spine. It lies in front of the vertebral bodies and intervertebral discs, following the natural curve of the spine. The spinal cord, which is encased by the vertebrae, is located posteriorly, making the anterior longitudinal ligament an essential component for maintaining structural integrity while allowing for a functional range of motion.

Did You Know?

The anterior longitudinal ligament is the only ligament in the body that limits spinal extension.
Injuries or degeneration of this ligament can lead to conditions such as spondylolisthesis, where one vertebra slips forward over another.
The anterior longitudinal ligament is usually involved in the healing process of spine injuries, as it stabilizes the affected area.