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Fig. 2. (Top) Schematic drawing shows the cardiac ganglion and the right (r) and
left (l) CI, CA1 and CA2 nerves joining the cardiac ganglion (CG) in the
anterior part of the heart. (AD) Photographs of the the outlined areas
in the top diagram, showing the cardiac ganglion and cardioregulatory nerves
in the cardiac ganglion trunk (CGT) in the anterior region of the heart
stained with Methylene Blue. Neural branch (NB) from the trunk of the CG
extends to the myocardium. AA, anterior artery; LA1to LA5, The 1st to 5th
lateral arteries. Scale bars, 50 µm.