Sacrospinalis

Sacrospinalis (also known as the Erector Spinae or Spinal Erectors) is a large muscle group that extends along the length of the spine from the base of the skull to the pelvis. This muscle group is responsible for the extension and lateral flexion of the vertebral column, and for the rotation of the spine.

Anatomy

The Sacrospinalis is divided into three columns: the Iliocostalis, the Longissimus, and the Spinalis. Each of these columns is further divided into parts.

• Iliocostalis: This is the most lateral column. It is divided into three parts: the Iliocostalis Lumborum, the Iliocostalis Thoracis, and the Iliocostalis Cervicis.
• Longissimus: This is the intermediate column. It is also divided into three parts: the Longissimus Thoracis, the Longissimus Cervicis, and the Longissimus Capitis.
• Spinalis: This is the most medial column. It is divided into three parts: the Spinalis Thoracis, the Spinalis Cervicis, and the Spinalis Capitis.

Function

The Sacrospinalis plays a crucial role in maintaining upright posture, and in movements of the vertebral column. It allows for extension (bending backward), lateral flexion (bending to the side), and rotation of the spine.

Clinical significance

Injury or strain to the Sacrospinalis can result in back pain, particularly in the lower back. Conditions such as lumbar disc disease, spondylolisthesis, and spinal stenosis can also affect the Sacrospinalis.

See also

• List of muscles of the human body
• Back pain
• Spinal disc herniation

Sacrospinalis Resources
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References

External links

• Healthline: Erector Spinae Muscles
• Kenhub: The Back Muscles