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. superior mesenteric plexusthe celiac ganglia with the sympathetic plexuses of the abdominal viscera radiating from the ganglia.detailsfromceliac plexusidentifierslatinplexus mesentericus superiorta98a14.3.03.029ta26705fma6639anatomical terms of neuroanatomy it surrounds the superior mesenteric artery, accompanies it into the mesentery, and divides into a number of secondary plexuses, which are distributed to all the parts supplied by the artery, viz., pancreatic branches to the pancreas; intestinal branches to the small intestine; and ileocolic, right colic, and middle colic branches, which supply the corresponding parts of the great intestine. the nerves composing this plexus are white in color and firm in texture; in the upper part of the plexus close to the origin of the superior mesenteric artery is the superior mesenteric ganglion. additional images the right sympathetic chain and its connections with the thoracic, abdominal, and pelvic plexuses. diagram of efferent sympathetic nervous system. lower half of right sympathetic cord.