Fig. 5. Ganglion cell clusters other than the ganglion cardiacum. Sagittal sections stained with antibodies to tyrosine hydroxylase (TH) (A, C, F), neuronal nitric oxide synthase (NOS) (B, D, G) and chromogranin A (chrA) (E, H). Panels A and B display a ganglion adjacent to the aortic valve (AOV; topographical anatomy, see the upper circle in Fig. 3A), while panels C–E display a small ganglion (arrow) near the left common cardinal vein (LCCV; topographical anatomy, see the lower circle in Fig. 3A). The former ganglion contains abundant TH-positive neurons (A), whereas the latter ganglion is negative for neurons expressing TH (C). Panels F–H show intramural neurons of the esophagus (ES). TH-positive nerves are present near (arrows in panel F), but not in the ES. All panels were prepared at the same magnification. Scale bar=0.1 mm (A).