Esophageal plexus

The esophageal plexus is formed by nerve fibers from two sources, branches of the vagus nerve, and visceral branches of the sympathetic trunk. The esophageal plexus and the cardiac plexus contain the same types of fibers and are both considered thoracic [autonomic plexus].

Parasympathetic fibers

The vagus nerve delivers two fiber types to the esophageal plexus:

Preganglionic [nerve fibers|Parasympathetic preganglionic fibers]These fibers have their cell bodies located in the dorsal motor nucleus of the vagus and they will synapse on the terminal ganglia in the walls of the esophagus.
Afferent fibersThese fibers are primarily concerned with autonomic reflexes and they have their cell bodies in the inferior ganglion of the vagus.

These vagal fibers in the esophageal plexus reform to make the anterior vagal trunk and the posterior vagal trunk. Anterior and posterior being terms in relation to the esophagus, a mnemonic for which is "LARP": Left becomes Anterior, Right becomes Posterior.

Sympathetic fibers

The visceral branches of the sympathetic trunk also deliver two fiber types to the esophageal plexus:

Sympathetic postganglionic fibersThe cell bodies of these fibers are located in the sympathetic [chain ganglia]. The cell bodies of the preganglionic fibers, the first neuron of this two neuron chain, are located in the intermediolateral cell column of the thoracic spinal cord.
Afferent fibersThese fibers are primarily concerned with pain and have cell bodies located in the dorsal root ganglion.