this image shows a horizontal section in the lateral wall of the thorax displaying the origin, course , branches and relations of the intercostal nerve in the intercostal space between the ribs
showing:
1. posterior division
2. recurrent branch
3. sympathetic ganglion
4. communicating rami
5. intercostal nerve
6. lateral cutaneous nerve
7. internal mammary artery
8. anterior cutaneous nerve
9. external intercostal muscle
10. internal intercostal muscle
11. sternum bone
12. transversus thoracis muscle
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