Summary
The anatomy of the coeliac-superior mesenteric ganglion (CSMG) complex of 28 female Wistar rats was studied by serial paraffin sections and found to be consistent in composition and in relations. The CSMG comprises two suprarenal ganglia in continuity with the major splanchnic nerves, these continuing as splanchnic trunks into paired coeliac ganglia. The left coeliac ganglion is larger than the right as it has a superior mesenteric component related to the artery of that name. Lastly, intermesenteric ganglia are related to the renal and ovarian arteries and to the origin of the intermesenteric nerves.
Ink injections and microvascular casts indicate that the main extrinsic blood supply to the CSMG is derived from the inferior phrenic artery, a branch of which enters the complex at the suprarenal ganglia and supplies the CSMG via the splanchnic trunks. Also, recurrent branches of the ovarian arteries enter the intermesenteric nerves to supply the complex at its caudal pole. A few small arteries not associated with nerves and probably derived from lumbar arteries also supply the CSMG complex. The two major postganglionic nerve trunks have an abundant vasculature in continuity with that of the CSMG but whose origin and direction of blood flow has yet to be determined.
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Hamer, D.W., Santer, R.M. Anatomy and blood supply of the coeliac-superior mesenteric ganglion complex of the rat. Anat Embryol 162, 353–362 (1981). https://doi.org/10.1007/BF00299978
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DOI: https://doi.org/10.1007/BF00299978