Sympathetic preganglionic neurons leave the spinal nerves through the rami.
Question
Sympathetic preganglionic neurons leave the spinal nerves through the rami.
Solution
Yes, that's correct. Sympathetic preganglionic neurons do indeed leave the spinal nerves through the white rami communicantes. These neurons originate in the thoracic and lumbar regions of the spinal cord. From there, they pass into the sympathetic chain, either synapsing with a postganglionic neuron in a ganglion at the same level, ascending or descending the chain to synapse in a different ganglion, or passing through the chain to synapse in a peripheral ganglion.
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