NEUROLOGY 



of the three cardiac nerves, arises from the middle cervical ganglion, or from the 

 trunk between the middle and inferior ganglia. On the right side it descends behind 

 the common carotid artery, and at the root of the neck runs either in front of or 

 behind the subclavian artery; it then descends on the trachea, receives a few 

 filaments from the recurrent nerve, and joins the right half of the deep part of the 

 cardiac plexus. In the neck, it communicates with the superior cardiac and recur- 

 rent nerves. On the left side, the middle cardiac nerve enters the chest between 

 the left carotid and subclavian arteries, and joins the left half of the deep pa 

 of the cardiac plexus. 



THORACIC NERVES 

 RAMI COMMUNICANTES' 



. INFERIOR CER- 

 VICAL GANGLION 



VISCERAL 

 'BRANCHES 



SPLANCHNIC 

 GANGLION 

 GREATER 



SPLANCHNIC 



LESSER 

 SPLANCHNIC 



OUADRATUS 

 LUMBORUM 



RENAL PLEXUS 



FIG. 845. Plan of right sympathetic cord and splanchnic nerves. (Testut.) 



The inferior cervical ganglion {ganglion cervicale inferius) is situated between 

 the base of the transverse process of the last cervical vertebra and the neck of the 

 first rib, on the medial side of the costocer vical artery. Its form is irregular ; it is 

 larger in size than the preceding, and is frequently fused with the first thoracic 

 ganglion. It is probably formed by the coalescence of two ganglia which corre- 

 spond to the seventh and eighth cervical nerves. It is connected to the middle 



