790 



THE NERVOUS SYSTEM. 



The superficial cardiac plexus is placed in the hollow of the aortic arch, 

 superficial to the pericardium. It contains a small ganglion (cardiac ganglion of 

 Wrisberg), and is joined by two small nerves (1) the cardiac branch from the 

 superior cervical ganglion of the sympathetic, and (2) the inferior cervical cardiac 

 branch of the vagus both of the left side which reach it after passing over the 

 arch of the aorta. 



Vagu 



Nervus caroticus intern us 

 / 



Nervus caroticus interm 



Superior cervical ganglion 

 of the aympatheti 



Superior cardiac branch H 



Middle cervical gangli 

 Superior cardiac branch 

 Middle cardiac branch 



Inferior cervical ganglion 



Inferior cardiac branch~-- 



Recurrent nerve"- 



Inferior cardiac branch - 



Cardiac branch from right recurrent nerve- 



Thoracic cardiac branch of vagus 



Deep cardiac plexus -jm 



Nerves to posterior. ffg[ f 

 pulmonary plexus 



Branches to right anterior ^i^T13 

 pulmonary plexus 



Anterior pulmonary plexus- 

 Superior vena cava- 



Branches to right coronary plexus 



Kight coronary plexus**- 



Superior cervical ganglion 

 of the sympathetic 



Superior cardiac branch 



Vagus 



'Middle cervical ganglion 

 Superior cardiac branch 



Middle cardiac branch 



"Inferior cardiac branch 

 Inferior cervical ganglion 



" ' Inferior cardiac brunch 



' Recurrent nerve 



Cardiac branch from left recurrent nerve 

 Middle cardiac branch 



"Inferior cardiac branch 



Superior cardiac branch 

 - Cardiac branch from left recurrent nerve 



Deep cardiac plexus 



.Superficial cardiac plexus 



Nerves to posterior pulmonary plexus 



Branches to left anterior pulmonary plexu" 



Branches to left vagus 

 Pulmonary artery 



Branches to right coronary plexus 



Anterior pulmonary plexus 



Aorta 

 Branches to right coronary plexus 



Branches to left coronary plexus 



: - Left coronary plexv 



FIG. 661. THE INNERVATION OF THE HEART. 



Branches and Communications. From the plexus branches of communication 

 pass (1) to the left half of the deep cardiac plexus, between the aortic arch and the 

 bifurcation of the pulmonary artery; (2) to the left anterior pulmonary plexus 

 along the left branch of the pulmonary artery ; (3) the branches of distribution to 

 the heart extend along the pulmonary artery to join the anterior (right) coronary 

 plexus, which supplies the substance of the' heart in the course of the right 

 coronary artery. 



Plexus Cardiacus Profundus. The deep cardiac plexus is much larger. It 



