Longissimus

Longissimus is the longest intermediate muscle of the back, that is part of the Erector spinae, or the paraspinal muscles. It is located on either side of the vertebral column.

Anatomy

The Longissimus muscle is divided into three parts:

• Longissimus capitis: This muscle extends from the transverse processes of the upper five or six thoracic vertebrae to the posterior part of the mastoid process of the temporal bone.
• Longissimus cervicis: This muscle extends from the transverse processes of the upper five or six thoracic vertebrae to the transverse processes of the second through sixth cervical vertebrae.
• Longissimus thoracis: This muscle extends from the lumbar and sacral vertebrae to the transverse processes of all the thoracic vertebrae and the seventh cervical vertebra.

Function

The Longissimus muscle is responsible for lateral flexion of the spine, extension of the vertebral column, and rotation of the vertebral column.

Clinical significance

Injury or strain to the Longissimus muscle can result in back pain. Treatment typically involves physical therapy, pain medication, and in some cases, surgery.

See also

• Erector spinae muscles
• Spinal muscles
• Back pain

References

Longissimus Resources
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