_Abdominal aorta--Coeliac Axis_: The upper portion of the abdominal aorta is innervated by the coeliac or solar plexus of the sympathetic. Sub-plexuses from the coeliac accompany the various branches of the aorta and are widely distributed to the blood-vessels and to the glands and non-striated muscle of the abdominal organs. The coeliac plexus receives fibres from the right vagus and from the greater, lesser, and least splanchnic nerves, by the latter route making connection with the thoracic ganglia of the sympathetic from fifth to last. These ganglia receive pre-ganglionic fibres from the thoracic spinal nerves in the form of white rami communicantes, so that it is not incorrect to say that the coeliac plexus and its branches are largely controlled by the condition of the last eight thoracic nerves. Through this intricate plexus it is difficult to trace the relations of each abdominal organ with the particular vertebrae of which subluxation would produce disease in said organ. By the aid of clinical experimentation covering a period of years and by diligent search among anatomies and physiologies, we have arrived at the conclusions indicated in succeeding statements. The most important spinal connection with the abdominal blood-vessels is that of the fifth dorsal vertebra, for the fifth dorsal nerve, by its rami, seems greatly to influence the caliber of the aorta and coeliac axis. [Illustration: A. Cortico Spinal nerve. B. Spino Ganglionic nerve. C. Ganglio Ganglionic nerve. D. Ganglio Peripheric nerve. E. Blood Vessel Wall. Parker Fig. 32. Schematic representation of nerve pathway from brain to periphery by way of sympathetic. ] _Liver_: Fourth thoracic nerves (especially the right) to gangliated cord, via great splanchnic nerve to coeliac plexus, by hepatic plexus to interior of liver. The hepatic plexus gives off the cystic plexus which controls the gall-bladder. _Stomach_: Sixth and seventh dorsal nerves by white rami to and through the ganglia of the gangliated cord to coeliac plexus. The gastric plexus is an offshoot of the coeliac and gives off Auerbach’s plexus to the muscular coat, and Meissner’s plexus to the submucous and mucous coats of the stomach. The nutrition of the stomach walls, their peristaltic action, and the secretory action of the stomach glands are thus brought under the direct influence of the sixth or the seventh dorsal subluxation. _Pancreas_: Eighth dorsal nerve by great splanchnic to coeliac plexus, to hepatic and superior mesenteric plexuses, and by the pancreatico-duodenal branches of the former and pancreatic branches of the latter to the pancreas.