Thoracolumbar fascia

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Thoracolumbar fascia
Superficial muscles of the back. The thoracolumbar fascia is the gray area at bottom center.
Latin fascia thoracolumbalis, fascia lumbodorsalis
Gray's subject #115 397

The thoracolumbar fascia (lumbodorsal fascia) is a deep investing membrane which covers the deep muscles of the back of the trunk. It is made up of three layers, anterior, middle, and posterior. The anterior layer is the thinnest and the posterior layer is the thickest. Two spaces are formed between these three layers of the fascia. Between the anterior and middle layer lies the quadratus lumborum muscle. The erector spinae muscle is enclosed between the middle and posterior layers.

Thoracolumbar fascia

Above, it passes in front of the serratus posterior superior and is continuous with a similar investing layer on the back of the neck—the nuchal fascia.



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