Fig. 11. Photographs of glutamate-like immunoreactivity in paraffin sections obtained from the heart. Glutamate-like immunoreactivity is seen in (Ai) the CA1 nerve and the cardiac ganglion trunk (CGT) and (Aii) the CA2 nerves on both sides and the CGT. (B) Glutamate-like immunoreactivity in the soma of the cardiac ganglion neuron. (C) Glutamate-like immunoreactivity in a major branch (MB) of the cardiac ganglion extending to the myocardium. Scale bar, 50 µm. The diagram shows the areas depicted in A–C.