1. The anterior divisions communicate with the sympathetic trunk . 2. Each receives a gray ramus communicans from the superior cervical ganglion of the sympathetic trunk . 3. Other fibers from lateral grey column neurons pass through the sympathetic trunk without synapsing there. 4. The white rami carry sympathetic fibers arising in the spinal cord into the sympathetic trunk . 5. Also, the ganglia of the thoracic sympathetic trunk have both white and gray rami communicantes. 6. It is to my understanding that : Sympathetic ganglia connect to each other to form the sympathetic trunk . 7. They are joined, near their origins, by gray rami communicantes from the lumbar ganglia of the sympathetic trunk . 8. The nerves of the sympathetic trunk arise from the spinal cord in the autonomic ( or involuntary ) nervous system. 9. The fibers of the sympathetic trunk above and below T1-L2 originate from white rami communicantes within T1-L2. 10. Near the origin of the divisions, they are joined by gray rami communicantes from the lumbar ganglia of the sympathetic trunk .
Mobile