Intercostal nerve

Intercostal Nerve

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Intercostal nerves and their distribution.

The Intercostal Nerves are part of the Peripheral Nervous System that run beneath the ribs. They are primarily responsible for conveying sensory information from the thoracic and abdominal walls to the central nervous system.

Anatomy

The intercostal nerves are the anterior divisions of the thoracic spinal nerves from T1 to T11. The intercostal nerves are distributed chiefly to the thoracic pleura and abdominal peritoneum and differ from the anterior divisions of the other spinal nerves in that each pursues an independent course without plexus formation.

Function

The intercostal nerves are responsible for the motor innervation of the intercostal muscles and the transversus thoracis muscle, which function in respiration. They also provide sensory innervation to the skin of the chest and back.

Clinical Significance

Damage to the intercostal nerves can result in loss of sensation or motor function in the areas of the body served by the nerve. This can occur as a result of trauma, surgery, or diseases such as shingles.

See Also

• Nervous System
• Thoracic Nerves
• Peripheral Nervous System