| Nerve(s) | Main Motor Function | Main Sensory Function | Key Note | |----------|--------------------|----------------------|-----------| | | Hand muscles (via brachial plexus) | Medial arm/forearm | Also contributes to upper limb | | T2 - T6 | Intercostal muscles (breathing) | Chest wall, upper back, axilla | "Typical intercostal nerves" | | T7 - T11 | Abdominal wall muscles | Upper abdomen, lower ribs | Help form thoracoabdominal nerves | | T12 | Abdominal wall (via subcostal nerve) | Lower abdomen, upper buttock | Not between ribs, below 12th rib |
The thoracic nerves are the architects of the thoracic cage and abdominal wall movement. thoracic nerve