A thoracic nerve diagram typically maps out the specific "bands" or regions each nerve controls. These are categorized by their motor (movement) and sensory (feeling) roles. Physiopedia Dermatomes - Physiopedia
These run in the (between the internal and innermost intercostal muscles), accompanied by the intercostal artery and vein (VAN arrangement: Vein, Artery, Nerve from superior to inferior). thoracic nerve diagram
The thoracic nerves are unique because, unlike the cervical or lumbar nerves which form complex "plexuses" (interweaving networks), most thoracic nerves run directly to the parts of the body they innervate. A thoracic nerve diagram typically maps out the
| Nerve | Lesion / Irritation | Clinical Finding | |-------|--------------------|------------------| | Any intercostal | Herpes zoster (shingles) | Vesicular rash in a single dermatome (e.g., T4–T6 most common) | | T2–T3 | Lung cancer (Pancoast tumor) | Pain down medial arm (T2) + Horner’s syndrome (sympathetic chain) | | T7–T11 | Post-thoracotomy pain | Numbness or neuralgia along thoracoabdominal nerves | | T10 | Abdominal surgery | Loss of sensation at umbilicus; reflex (contraction on stroking) lost | | T12 | Subcostal nerve entrapment | Pain in lower quadrant (mimics appendicitis) | The thoracic nerves are unique because, unlike the