1368 



HUMAN ANATOMY. 



distinct portions, a right and a left, united by numerous fibres around the lower end 



of the trachea. The right portion receives as tributaries all of the cardiac branches 



of the sympathetic, vagus and inferior laryngeal nerves of the right side. The left 



portion receives all of the cardiac branches of the left vagus and sympathetic nerves, 



except the two which enter the superficial plexus (the superior cervical cardiac branch 



of the left gangliated cord and the inferior cervical branch of the left vagus), with the 



addition of filaments from the left inferior laryngeal nerve and from the superficial 



cardiac plexus. 



Fig. 1 135. 



Phrenic nerve^ 



Vena cava 

 superior 



Pericardium, 

 cut edge 



Right 



coronary 



artery 



Thyroid body 



Superior cervical cardiac 

 branch of sympathetic 



Clavicle 



Combined cervical 

 cardiac brs. of 

 right sympathetic 

 I. rib 



Aorta . , 



Right rj 

 coronary 

 plexus 



Superior cervical cardiac branch of 



sympathetic 



Sympathetic nerve 



Vagus nerve 



Superior cervical cardiac branch of vagus 



Middle cervical ganglion 



Scalenus anticus 



Middle cervical cardiac of sympathetio 



Brachial plexus 



Inferior cervical ganglion 



Inf. cervical cardiac br. of sympathetic, cross- 

 Phrenic nerve I ing vertebral artery 

 Subclavian artery to join middle br- 

 Inf. cervical cardiac branch of vagus 



Recurrent laryngeal nerve 

 Phrenic ners-e 



Recurrent laryngeal nerve 



Superficial cardiac plexus, showing ganglioa 

 of Wrisberg 



Pulmonarj' artery 

 Left coronary artery 



1\> 



s 



Dissection showing constituents of superficial cardiac plexus, other cardiac nerves and right 



coronary plexus. 



Fro77t the right portion of the plexus arises the right or anterior coronary 

 plexus (plexus coronarius cordis anterior), to which fibres are sent from the superficial 

 plexus. This plexus reaches the heart by coursing along the ascending aorta and 

 then follows the right coronary artery, in whose course it distributes fibres to adjacent 

 portions of the heart. Other branches from the right portion join the superficial 

 cardiac plexus and the right anterior pulmonary plexus. 



From the left portion originates the left or posterior coronary plexus (plexus 

 coronarius cordis posterior) which, reinforced by fibres from the superficial plexus, 

 follows the course and distribution of the corresponding artery. The left portion 

 contributes filaments to the superficial cardiac and left anterior pulmonary plexuses. 



The Solar Plexus. 

 The abdominal and pelvic cavities are innervated by the solar, hypogastric and 

 pelvic ple.xuses, composed of the visceral branches of the lower thoracic, lumbar and 

 upper sacral portions of the gangliated cord, in conjunction with the central nervous 



