It extends from the nuchal ligament and vertebrae until the sacrum. The thoracolumbar fascia serves as an attachment site for various muscles of the back, even housing the deep ones.
This article will describe the anatomy of the thoracolumbar fascia.
|Attachments||Nuchal ligament, spinous processes, supraspinous ligament, median crest of sacrum|
|Function||Attachment for trapezius, latissimus dorsi, gluteus maximus and hamstring muscles.
Houses several deep muscles of the back, for instance quadratus lumborum, transversospinalis, spinal erectors and multifidus.
The deep fascia of the back attaches medially to the nuchal ligament, the tips of the spinous processes of the vertebrae, the supraspinous ligament, and changes its name at the thoracic and lumbar regions to the thoracolumbar fascia before inserting into the median crest of the sacrum as depicted in the figure below.
The thoracolumbar fascia, like most other deep fasciae surrounds the deep muscles of the back and lumbar regions, and divides the muscles into compartments. It extends laterally from the spinous processes and forms a thin covering for the deep muscles in the thoracic region and a strong thick covering for muscles in the lumbar region where it is widest.
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- It acts as an attachment site for the trapezius muscle, latissimus dorsi, gluteus maximus and the hamstrings group of muscles thus playing an important role in body movements.
- Also, it houses the quadratus lumborum, transversospinalis, spinal erectors (Erector spinae) and multifidus muscles and their tendons, among other intrinsic muscles of the posterior thoracic and lumbar regions.
Find out more about the anatomy of these muscles below:
Chronic Low Back Pain: The thoracolumbar fascia has been implicated in pains of the lower back region buttocks (piriformis syndrome) and sacroiliac joint pains.