The peripheral innervation of the heart ofEledone moschata demonstrated by histofluorescence microscopy

Summary A fluorescence histochemical investigation of the cardiac nerves ofEledone moschata has demonstrated that they contain catecholamines. This suggests that the cephalopod heart is supplied by a double innervation, where cholinergic and aminergic mechanisms work antagonistically. This is similar to the vertebrate cardiac innervation and therefore represents a convergent evolution.