Nerves Chest

**Pectoral nerves** are paired nerve fibers passing through the intercostal spaces of the chest and innervating the skin of the chest wall, intercostal spaces, as well as muscles involved in the act of breathing (chest wall, diaphragm, cervical spinal cord).

**Pectoral nerves** are components of the anterior rami of the cervical spinal nerves C3-C6. They emerge from the intervertebral foramina of the thoracic vertebra at the level of T2T4 and then descend on both sides of the spine down to approximately the XI thoracic vertebra. The lateral trunk lies above and to the side of the spine, the medial trunk lies below, across