In the upper part of the superior mesenteric plexus

Superior mesenteric plexus

The superior mesenteric plexus is a continuation of the lower part of the celiac plexus, receiving a branch from the junction of the right vagus nerve with the plexus....

 close to the origin of the superior mesenteric artery

Superior mesenteric artery

In human anatomy, the superior mesenteric artery arises from the anterior surface of the abdominal aorta, just inferior to the origin of the celiac trunk, and supplies the intestine from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas.-Location...

 is a ganglion

Ganglion

In anatomy, a ganglion is a biological tissue mass, most commonly a mass of nerve cell bodies. Cells found in a ganglion are called ganglion cells, though this term is also sometimes used to refer specifically to retinal ganglion cells....

, the superior mesenteric ganglion.

The superior mesenteric ganglion is the synapsing point for one of the pre- and post-synaptic nerves of the sympathetic division of the autonomous nervous system. Specifically, contributions to the Superior Mesenteric Ganglion arise from TV10 and TV11. This nerve goes on to innervate the small intestine, the ascending colon and the transverse colon.