Upper intercostal nerve

The upper intercostal nerves are the anterior rami of the first six thoracic spinal nerves (T1-T6), which travel along the costal grooves of the ribs to provide motor and sensory innervation to the thoracic wall [StatPearls]. These nerves are responsible for the contraction of the intercostal muscles, which are vital for the mechanics of respiration, and they transmit sensory information from the skin of the chest and the parietal pleura [NYSORA]. While not a molecular target in the traditional sense, the upper intercostal nerves are a primary anatomical site for regional anesthesia and pain management interventions [PubMed]. Local anesthetics, such as bupivacaine and lidocaine, are applied to these nerves to block voltage-gated sodium channels, thereby preventing the transmission of nociceptive signals [PubChem]. This approach is commonly used to treat acute pain from rib fractures or surgical procedures like thoracotomy, as well as chronic conditions such as post-herpetic neuralgia [Mayo Clinic]. However, the proximity of these nerves to the pleura necessitates caution to avoid complications like pneumothorax during needle-based procedures [NYSORA].

Other names

Thoracic nerves T1-T6Anterior rami of thoracic spinal nervesIntercostal nerves T1-T6

Inhibition of voltage-gated sodium channels to block nerve impulse conduction