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Dorsal muscles

Synonym: muscles of the back
German: Rückenmuskulatur

1 Definition

The dorsal muscles are the skeletal muscles in the region of the back (dorsum).

2 Background

When looking at the muscles of the back, from evolutionary perspective, one can differentiate between muscles that developed at the spinal column and muscles that ìwanderedî to the back as their secondary reposition.

The muscle that developed locally are called ìautochtonousî, genuine ore primary dorsal muscles. They are divided into a medial and a lateral tract. In contrast to all other sceletal muscles of the human body, the autochtonous dorsal muscles are innervated by the posterior branches of the spinal nerves. As a whole, the autochtonous dorsal muscles are also called erector spinae muscles.

The muscles that are secondarily located on the back have a more superficial position, and as a whole, they are also called secondary dorsal muscles. They form a muscle group of heterogenous origin, and they are innervated regularly by the anterior branches of the spinal nerves.

3 Structure

The autochtonous dorsal muscles directly rest on the spinal column. Aside from the moving the spinal column, they are highly important for the posture of the body.

The thoracolumbar fascia wraps around the dorsal muscles from the chest to the pelvis. It forms a muscle compartment fixed on the spine and encompassing the muscle tissue. In the nuchal region, the nuchal fascia is developed correspondingly.

The secondary (superficial) dorsal muscles stem from the shoulder muscles], the bronchial muscles and the muscles of the limbs (e.g. the latissimus dorsi muscle).

4 Division

4.1 Autochtonous dorsal muscles (erector spinae muscle)

4.2 Secondary dorsal muscles

5 Clinical presentation

Tensions of the dorsal muscles often lead to myogenic back pain. Untrained an unphysiologically used dorsal muscles are a mass phenomenon in industrialized countries.

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