Figure 2
Comparative drawings of the posterior (A) and anterior (B) views of epicardial ganglionated subplexi (sGPs) in different mammals. Scheme summarizing the descriptions of the disposition, course, and innervation areas of sGPs highlighted in different colors. The dotted and shadowed areas represent the main locations of intracardiac ganglia. While topography of sGPs is generally similar, structural organization of these sGPs varies with the species. Intrinsic ganglia from small mammals are discretely located within the limits of heart hilum on the heart base which is demarcated by dashed lines, in contrast to larger mammals and humans, where these ganglia become progressively scattered and widely distributed. The left dorsal sGP (LDsGP) is labeled in red, middle dorsal (MDsGP) in yellow, dorsal right atrial (DRAsGP) in pink, ventral right atrial (VRAsGP) in blue, the ventral left atrial (VLAsGP) in green, left coronary (LCsGP) in brown, and the right coronary (RCsGP) in magenta, respectively. Other abbreviations: Ao-aorta; IVC-inferior vena cava; LAA-left atrial appendage; LAzV-left azygos vein; LIPV-left inferior pulmonary vein; LSPV-left superior pulmonary vein; PT-pulmonary trunk; RAA-right atrial appendage; RIPV-right inferior pulmonary vein; RSPV-right superior pulmonary vein; SVC-superior vena cava.