The splanchnic nerves are paired nerves which contribute to the innervation of the viscera, carrying efferent fibers of the autonomic nervous system as well as sensory afferent fibers from the visceral organs. All carry sympathetic fibers except for the pelvic splanchnic nerves, which carry parasympathetic fibers.
The term splanchnic nerves include the thoracic splanchnic nerves, the lumbar splanchnic nerves, sacral splanchnic nerves, and cardiopulmonary nerves.
Thoracic splanchnic nerves are splanchnic nerves that arise from the sympathetic trunk in the thorax and travel inferiorly to provide sympathetic innervation to the abdomen. The nerves contain preganglionic sympathetic and visceral afferent fibers.
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