J.Jpn. Surg. Soc.. 58(11): 1768-1790, 1958
THE PERIAORTIC AFFERENT PAIN-CONDUCTING PATHWAY IN THE ABDOMINAL CAVITY
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I. Department of Surgery, Kobe Medical College (Director: Prof. Noboru FUJITA) Hiroaki KAWAKITA |
Existence of the pain-conducting pathway in the external membrane (adventitia) of the aorta has been considered as a pathway of the abdominal visceral pain conduction.
1) By using a special apparatus a tracting stimulation was forced on the mesenterial blood vessels, and the extent of pain was described by measuring the increase in blood pressure and respiration, dilatation of the pupils, movement of the body and whining of the animals.
2) Section of the vagus, splanchnic nerves, thoracic cord, sympathetic trunk and upper branch of the aortic nerves and aortic sympathectomy were performed. The following results were obtained :
3) The existence of a new pain-conducting pathway, originating from the abdominal cavity ascending through the walls of the blood vessels entering the adventitial layer of the abdominal and thoracic aorta, then to the thoracic sympathetic trunk and finally to the dorsal cord below the level of the second thoracic spinal cord.
4) We have called this pathway "periaortic pain-conducting pathway of the abdominal cavity".
5) The impulse originating from the mesenteric artery runs up alone the afferent pathway of the artery, while the impulse originating from the mesenteric nerve is convoyed by the splanchnic nerve.
6) Clinically, a better anesthetic effect can be obtained by interrupting this pathway with local infiltration of 2% Novocaine solution.
(author's abstract)
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