The thoracic nerves are the spinal nerves emerging from the thoracic vertebrae.
Anterior divisions
Posterior divisions
The medial branches (ramus medialis; internal branch) of the posterior divisions of the upper six thoracic nerves run between the Semispinalis dorsi and Multifidus, which they supply; they then pierce the Rhomboidei and Trapezius, and reach the skin by the sides of the spinous processes.
The medial branches of the lower six are distributed chiefly to the Multifidus and Longissimus dorsi, occasionally they give off filaments to the skin near the middle line.
Additional images
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Areas of distribution of the cutaneous branches of the posterior divisions of the spinal nerves.
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Diagram of the course and branches of a typical intercostal nerve.
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Intercostal nerves, the superficial muscles having been removed.
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External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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Nerves: spinal nerves |
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| Cervical (8) |
C1, C2, C3, C4, C5, C6, C7, C8
anterior ( Cervical plexus, Brachial plexus) - posterior ( Posterior branches of cervical nerves, Suboccipital - C1, Greater occipital - C2, Third occipital - C3)
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| Thoracic (12) |
T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12
anterior ( Intercostal, Intercostobrachial - T2, Thoraco-abdominal nerves - T7-T11, Subcostal - T12) - posterior ( Posterior branches of thoracic nerves)
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| Lumbar (5) |
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| Sacral (5) |
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| Coccygeal (1) |
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