THE THORACIC PORTION OF THE GANGLIA TED CORD 1073 



paralysis. In irritation of the sympathetic the corresponding side of the face becomes pale, the 

 pupil dilates, the palpebral fissure widens, and the eyeball protrudes. In many cases there is 

 acceleration of the heart beats. In paralysis of the sympathetic the pupil contracts, the pal- 

 pebral fissure is narrowed by partial ptosis, the corresponding side of the face reddens, there is 

 an increase in the flow of tears, and recession of the eyeball. 



The surgeon occasionally resects the sympathetic. Jonnesco recommends bilateral removal 

 of the superior cervical ganglia for glaucoma, and bilateral removal of all the cervical sympa- 

 thetic ganglia for epilepsy and for exophthalmic goitre. The results of resection do not appear 

 to justify the operation. 



The Thoracic Portion (Pars Thoracalis) of the Gangliated Cord (Fig. 784). 



The thoracic portion of the gangliated cord consists of a series of ganglia 

 which usually correspond in number to that of the vertebrae; but, from the occa- 



THORACIC NERVE 

 RAMI COMMUNICANTES 



INFERIOR CER- 

 VICAL GANGLION 



VISCERAL 

 BRANCHES 



SPLANCHNIC 

 GANGLION 



SPLANCHNIC 



SMALL 

 SPLANCHNIC 



RIGHT VAGUS 



SMALL 

 SPLANCHNIC 



BRANCH OF VAGUS TO 

 SEMIIUMAR GANGLION 

 .CCELIflC AXIS 



SEMILUNAR GANGLION 

 SUPERIOR MESENTERIC 

 ARTERY AND PLEXUS 

 SOLAR PLEXUS 



QUADRATUS 

 LUMBORUM 



RENAL PLEXUS 



FIG. 784. Plan of the right sympathetic cord and splanchnic nerves. (Testut.) 



sional coalescence of two, their number is uncertain. The ganglia are placed 

 on each side of the spine, resting against the heads of the ribs, and are covered by 



68 



