Your sympathetic fibers are thoracolumbar — meaning that they originate from between your thoracic vertebrae where your ribs attach, and the lumbar vertebrae just inferior to your ribs.

你的交感神经纤维是胸腰椎——这意味着它们起源于胸椎之间，肋骨连接的地方，和肋骨下面的腰椎。