Fascia of the back

Fascia of the back.

There are three fascia of the back:

1. Superficial fascia of the back - a thin connective tissue sheet, part of the general subcutaneous fascia, covers the superficial muscles of the back.

2. The lavage fascia , fascia nuchae, is located in the posterior region of the neck, between the superficial and deep layers of the muscles. Medially it fuses with the ligamentous ligament, laterally passes into the superficial leaf of the fascia of the neck, at the top it is attached to the upper nasal line.

3. The lumbosacral fascia , fascia thoracolumbalis, forms a dense fibrous vagina, in which the deep muscles of the back lie. This fascia consists of two sheets - deep (front) and superficial (posterior).

A deep leaf of the lumbosacral fascia stretches between the transverse processes of the lumbar vertebrae, the iliac crest and the XII rib. It is present only in the lumbar region and lies in the gap between the square lumbar muscle, m. Quadratus lumborum, and the muscle that straightens the spine, m. Erector spinae.

The superficial leaf of the lumbosacral fascia is attached below to the iliac crests, laterally reaches the corners of the ribs and is medially attached to the spinous processes of all vertebrae, except the cervical. It reaches its greatest thickness in the lumbar region, in the upper parts it becomes much thinner. Lateral, lateral margin m. Erectoris spinae, the superficial leaf fuses with the deep one. In this way, a fibrous vagina is formed, in which the lumbar part of m lies. Erectoris spinae; The upper parts of this muscle are located in the osteo-fibrous vagina of the back.

From the surface sheet begin m. Latissimus dorsi and m. Serratus posterior inferior. From the deep fascia leaf, as well as from the site of its fusion with the superficial leaf, the transverse abdominal muscle begins, m. Transversus abdominis.