|verified| | Thoracic Spine Nerves

| Nerve | Course | Key Targets | |-------|--------|--------------| | | Joins brachial plexus (medial cord contribution) | Hand muscles (via ulnar nerve), intercostals | | T2–T6 | Intercostal nerves, run in costal groove | Intercostal muscles, skin of chest/upper back | | T7–T11 | Thoracoabdominal intercostal nerves | Abdominal muscles (external oblique, rectus), skin of abdomen | | T12 | Subcostal nerve (below 12th rib) | Lower abdominal wall, skin above inguinal ligament |

The dorsal rami of the thoracic nerves are smaller than the ventral rami. They pass backward through the deep muscles and divide into medial and lateral branches. thoracic spine nerves

Once they exit the spine, these nerves typically split into two main branches: | Nerve | Course | Key Targets |

Each thoracic nerve originates from the spinal cord as ventral (anterior) and dorsal (posterior) roots. These roots unite within the intervertebral foramen to form the spinal nerve proper. These roots unite within the intervertebral foramen to

Unlike the nerves in your neck (cervical) or lower back (lumbar), which often form complex web-like structures called plexuses to power your limbs, most thoracic nerves remain segmental. They primarily follow the path of your ribs, serving as the communication highway between your brain and the vital organs and muscles of your chest and abdomen. Anatomy and Structure of Thoracic Nerves

Each thoracic nerve is composed of:

The smaller branch that turns toward the back to innervate the skin and deep muscles of the spine. Functional Breakdown by Nerve Level