| Front | Sympathetic pathway details |
|---|---|
| Back | 1. Pre-ganglionic axon exits spinal cord via ventral root (T1-L2), enters the spinal nerve, and takes the ventral ramus. 2. The axon exits the ventral ramus quickly and takes the myelinated white communicating ramus to the sympathetic ganglion within the sympathetic trunk. 3. Post-ganglionic axons can either (a) move through the sympathetic trunk and eventually exit via grey communicating rami (at all spinal cord levels) back to the spinal nerve. They can then take the dorsal ramus or ventral ramus to reach their target. (b) exit trunk ganglia through splanchic nerves that innervate thoracic viscera. |
Tags: ans
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