Intercostal nerves

Intercostal nerves are part of the somatic nervous system that arise from the anterior rami of the thoracic spinal nerves from T1 to T11. They are primarily responsible for conveying sensory information from the thoracic and abdominal walls, as well as motor information to the intercostal muscles and the abdominal wall muscles.

Anatomy

The intercostal nerves are located between the ribs, and they carry specific fibers for both sensory and motor functions. They are divided into typical and atypical nerves. The typical intercostal nerves are the third to the sixth intercostal nerves, while the atypical nerves include the first, second, and seventh to eleventh intercostal nerves.

Function

The intercostal nerves have both sensory and motor functions. They provide sensory innervation to the skin of the thorax and abdomen, and motor innervation to the intercostal muscles, abdominal muscles, and several muscles of the back.

Clinical significance

Damage to the intercostal nerves can result in intercostal neuralgia, a condition characterized by severe, episodic pain in the area of the affected nerve. This can be caused by a variety of factors, including thoracic surgery, herpes zoster, or chest trauma.

See also

• Nervous system
• Thoracic nerves
• Abdominal wall

References

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  Intercostal nerves diagram

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  Intercostal nerves and surrounding structures

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  Diagram of the human nervous system

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  Intercostal nerves in relation to the ribs

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  Diagram of the brachial plexus

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  Colored diagram of the brachial plexus