T1–T11 supply limb muscles except T1 (hand).
| 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 | thoracic spine nerves
The thoracic spine nerves control various bodily functions, including: T1–T11 supply limb muscles except T1 (hand)
The thoracic spinal nerves comprise the twelve pairs of spinal nerves emanating from the thoracic vertebrae. While often overshadowed by the cervical and lumbar plexuses in clinical discourse, the thoracic nerves are critical for autonomic regulation, trunk stability, and cutaneous innervation. This paper provides a detailed examination of the thoracic nerve anatomy, their unique exit pathways via intervertebral foramina, the formation of the thoracic plexus, and the clinical syndromes associated with thoracic nerve pathology, including intercostal neuralgia and thoracic outlet syndrome. This paper provides a detailed examination of the