Left Ant Caval vein .Ttiyht Ant Cavsl vein 



^m^^^^f 



neuron 



"euron 



Auricular 



,- ning from n 



Sinus to auricle [.Position of 



Hook from 

 'Heart lever 



vonBezold's Oanqlion 



in Auricular seprum /,, , _ 



I 'Bidders Ganglion 



in aurkulo-ventricular junction 



JtimulaHng electrodes 



in sino-auricular junction [Crescent] 



Sympathetic fibres = dotted lines 



Fig. 68. Diagram to show the innervation cf the heart in the frog or turtle. The electrodes 

 are represented as applied to the white crescentic line where they will stimulate some postganglionic 

 fibers. (From Jackson.) 



