Figure 3
Macrophotographs of the newborn (A) and the adult (B) pressure inflated human left atrium stained histochemically for acetylcholinesterase from the inferior (A) and the lateral (B) views. Note in panel A the parallel epicardial nerves of the LDsGP that extend from and inside the ligament of Marshal (LOM) on the lateral wall of left atrium towards the inferior side of left atrium (arrows) supplying the walls of left pulmonary veins (PV) by thinner ganglionated nerves. White arrows in panel B point to epicardial nerves of the LDsGP that extend on lateral side of the left atrium as the LOM or the left atrial neural fold. Moreover, note the thin epicardial nerves branching from the MDsGP and LDsGP in panel A as well as from LDsGP in panel B that proceed towards the PVs. Dotted line in panel A marks the reflection of pericardium into epicardium on roots of the left PVs. Abbreviations are same as in figure 2.