"The intercostal nerves are the anterior rami of thoracic spinal nerves T1-T11.They traverse around the thoracic and abdominal walls in the subcostal grooves of the ribs (within the intercostal spaces). In these grooves the intercostal nerves are the lowest structure, with the intercostal vein and artery superior; thus, of the three structures running in the subcostal grooves, the nerves are the least protected by the ribs. The anterior division of the T12 nerve is not technically an intercostal nerve as it located below rib 12 and there is not a rib 13 (thus, there is not an intercostal space here); it is named, the subcostal nerve. While in the subcostal groove the intercostal nerves are bounded deeply by the innermost intercostal muscles and superficially by the internal intercostal muscles. The first two intercostal nerves (T1 and T2), in addition to supplying the thorax, also provide cutaneous sensation to the arm via the brachial plexus (mainly T1), and via the intercostobrachial nerve (T2). The first six intercostal nerves terminate anteriorly as the anterior cutaneous branches in the corresponding intercostal spaces just below the corresponding ribs. The seventh through eleventh intercostal nerves exit the intercostal spaces and terminate in the abdominal wall. These last five intercostal nerves are termed thoracoabdominal nerves due to this pathway. The intercostal nerves provide cutaneous sensation and muscular innervation.1,2"
"The intercostal nerves are in constant risk of being damaged during thoracotomy procedures because they are very exposed at the bottom of the ribs. The intercostal nerves are also in danger of transection during the placement of a chest tube. Injury to the intercostal nerves during such procedures produces acute severe pain. Magnetic resonance neurography (MRN) can show the intercostal nerves throughout their course along the chest and upper abdominal walls. The nerves may occasionally be visualised via ultrasound.3,4 The right lower quadrant pain in appendicitis results from the inflamed appendix contacting the right abdominal wall and irritating the branches of the intercostal nerves innervating the peritoneum lining the wall.6"
"The intercostal nerves are the anterior rami of thoracic spinal nerves T1-T11.They traverse around the thoracic and abdominal walls in the subcostal grooves of the ribs (within the intercostal spaces). In these grooves the intercostal nerves are the lowest structure, with the intercostal vein and artery superior; thus, of the three structures running in the subcostal grooves, the nerves are the least protected by the ribs. The anterior division of the T12 nerve is not technically an intercostal nerve as it located below rib 12 and there is not a rib 13 (thus, there is not an intercostal space here); it is named, the subcostal nerve. While in the subcostal groove the intercostal nerves are bounded deeply by the innermost intercostal muscles and superficially by the internal intercostal muscles. The first two intercostal nerves (T1 and T2), in addition to supplying the thorax, also provide cutaneous sensation to the arm via the brachial plexus (mainly T1), and via the intercostobrachial nerve (T2). The first six intercostal nerves terminate anteriorly as the anterior cutaneous branches in the corresponding intercostal spaces just below the corresponding ribs. The seventh through eleventh intercostal nerves exit the intercostal spaces and terminate in the abdominal wall. These last five intercostal nerves are termed thoracoabdominal nerves due to this pathway. The intercostal nerves provide cutaneous sensation and muscular innervation.1,2"
"Branches to abdominal wall muscles including rectus abdominis"
"Branches supplying the peritoneum"
"Clinical and Radiologic Considerations"
Expected headings
"Clinical and Radiologic Considerations"
"The intercostal nerves are the anterior rami of thoracic spinal nerves T1-T11.They traverse around the thoracic and abdominal walls in the subcostal grooves of the ribs (within the intercostal spaces). In these grooves the intercostal nerves are the lowest structure, with the intercostal vein and artery superior; thus, of the three structures running in the subcostal grooves, the nerves are the least protected by the ribs. The anterior division of the T12 nerve is not technically an intercostal nerve as it located below rib 12 and there is not a rib 13 (thus, there is not an intercostal space here); it is named, the subcostal nerve. While in the subcostal groove the intercostal nerves are bounded deeply by the innermost intercostal muscles and superficially by the internal intercostal muscles. The first two intercostal nerves (T1 and T2), in addition to supplying the thorax, also provide cutaneous sensation to the arm via the brachial plexus (mainly T1), and via the intercostobrachial nerve (T2). The first six intercostal nerves terminate anteriorly as the anterior cutaneous branches in the corresponding intercostal spaces just below the corresponding ribs. The seventh through eleventh intercostal nerves exit the intercostal spaces and terminate in the abdominal wall. These last five intercostal nerves are termed thoracoabdominal nerves due to this pathway. The intercostal nerves provide cutaneous sensation and muscular innervation.1,2"
"The intercostal nerves are the anterior rami of thoracic spinal nerves T1-T11.They traverse around the thoracic and abdominal walls in the subcostal grooves of the ribs (within the intercostal spaces). In these grooves the intercostal nerves are the lowest structure, with the intercostal vein and artery superior; thus, of the three structures running in the subcostal grooves, the nerves are the least protected by the ribs. The anterior division of the T12 nerve is not technically an intercostal nerve as it located below rib 12 and there is not a rib 13 (thus, there is not an intercostal space here); it is named, the subcostal nerve. While in the subcostal groove the intercostal nerves are bounded deeply by the innermost intercostal muscles and superficially by the internal intercostal muscles. The first two intercostal nerves (T1 and T2), in addition to supplying the thorax, also provide cutaneous sensation to the arm via the brachial plexus (mainly T1), and via the intercostobrachial nerve (T2). The first six intercostal nerves terminate anteriorly as the anterior cutaneous branches in the corresponding intercostal spaces just below the corresponding ribs. The seventh through eleventh intercostal nerves exit the intercostal spaces and terminate in the abdominal wall. These last five intercostal nerves are termed thoracoabdominal nerves due to this pathway. The intercostal nerves provide cutaneous sensation and muscular innervation.1,2"
"The intercostal nerves are the anterior rami of thoracic spinal nerves T1-T11.They traverse around the thoracic and abdominal walls in the subcostal grooves of the ribs (within the intercostal spaces). In these grooves the intercostal nerves are the lowest structure, with the intercostal vein and artery superior; thus, of the three structures running in the subcostal grooves, the nerves are the least protected by the ribs. The anterior division of the T12 nerve is not technically an intercostal nerve as it located below rib 12 and there is not a rib 13 (thus, there is not an intercostal space here); it is named, the subcostal nerve. While in the subcostal groove the intercostal nerves are bounded deeply by the innermost intercostal muscles and superficially by the internal intercostal muscles. The first two intercostal nerves (T1 and T2), in addition to supplying the thorax, also provide cutaneous sensation to the arm via the brachial plexus (mainly T1), and via the intercostobrachial nerve (T2). The first six intercostal nerves terminate anteriorly as the anterior cutaneous branches in the corresponding intercostal spaces just below the corresponding ribs. The seventh through eleventh intercostal nerves exit the intercostal spaces and terminate in the abdominal wall. These last five intercostal nerves are termed thoracoabdominal nerves due to this pathway. The intercostal nerves provide cutaneous sensation and muscular innervation.1,2"