1 3 68 



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. 1135. 



Thyroid body 



Superior cervical cardiac 

 branch of sympathetic 



Vagu 



Clavicle 



Combined cervical 



cardiac brs. of 



right sympathetic 



I. rib' 



Superior cervical cardiac 

 sympathetic 



pathetic nerve 

 s nerve 

 1 



or cervical cardiac branch of vagus 

 ddle cervical ganglion 

 :nus anticus 



Middle cervical cardiac of sympathetic 



Brachial plexus 

 Inferior cervical ganglion 

 vical cardiac br. of sympathetic, cross- 

 : nerve I in^ vertebral artery 



tian artery to join middle br- 



rvical cardiac branch of vagus 



irrent laryngeal nerve 

 enic nerve 



Recurrent laryngeal nerve 



Suiierndal cardiac plexus, showing ganglion 

 of Wrisberg 



Pulmonary artery 

 Left coronary artery 



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



coronary plexus. 



From 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 arc innervated by the solar, hypogastric and 



pelvic plexuses, composed of the visceral branches of the lower thoracic, lumbar and 



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



