77/7-: (;/;/:. IV >T.V/'.r/7//-./7r MViVnrs XYSTI'M. 785 



division which follows tho spheno-spinal artery passes to the otic ganglion ; 

 the same takes place, no doubt, in auimals. 



r. Tho ijiitfttrul or jJtaryngcnl Jllann-nls, arising from the anterior border 

 of the ganglion and tho inferior carotiilciin fasciculus, are generally very 

 d( licute. Those which reach the superior wall of tho pharynx concur, with 

 the glosso-pharyngeal and the pnouraogastric, to form the pharyngeal plexus. 



B. INTERMEDIATE CORD OF THE Two CERVICAL GANGLIA. This cord 

 leaves tho inferior extremity of the superior cervical ganglion, lies close 



i-: the pneumogastric nerve, which always surpasses it in volume, and 

 descends to tho entrance of the thorax, where it separates from the vagus 

 nerve, and joins the inferior cervical ganglion. It neither receives or gives 

 off any branch in its course. 



C. INTERIOR CERVICAL GANGLION (Fig. 362, 2). Generally thicker 

 than the superior, this ganglion is placed within the costal insertion of the 

 inferior scalenus. Tho right, always a little more anterior than the other, 

 is applied immediately against the side of tho trachea. That of the left side 



; titrated from it by the oesophagus. Both are related, externally to tho 

 vertebral artery. 



Tho inferior cervical ganglion is very liable to vary, and, become 

 irregular in form. It is sometimes lenticular, at others more or less 

 elongated, always stellate, and not unfrequently double. In the latter case, 

 which is perhaps more frequent in the left than the right, its two portions 

 are distinguished into anterior and posterior : the hast forms the inferior 

 cervical ganglion, properly called (Fig. 362, 2) : the former is much smaller, 

 and is bound to the other by a wide and short greyish band, constituting 

 what has been designated in Man the middle cervical ganglion (Fig. 362, 3). 



In front, the ganglion which we are describing receives the cord inter- 

 mediate to the two ganglionic enlargements in the region of the neck, either 

 directly, or through the medium of the middle cervical ganglion, when that 

 is present. It is continued backwards with the dorsal portion of tho 

 sympathetic chain. 



AFFERENT BRANCHES. These are two, proceeding from the cervical pairs. 



One is a thick nerve, satellite to the cervical vertebral artery, and lodged 

 with it in tho foramina of the cervical vertebra) ; it is formed by filaments 

 emanating from -tho second, third, fourth, fifth, sixth, and seventh pairs of 



1 to 2, Cerrical portion of the sympathetic chain ; 1, Superior cervical ganglion, in 

 the middle of the guttural plexus; 2, Inferior rervical ganglion; 3, Middlf 

 cervical ganglion; 4, Intermediate cervical cord, intimately uniu-'l at its middle 

 jx.rtiou with the pnenmogaatric nerve ; 5, Cardiac nerves ; 6, Dorsal portion of the 

 n ; 7, Great splanchnic nerve ; 8, Lesser splanchnic nerve ; 9, 

 S-milunar ganglion, centre of the solar plexus; 10, Portion of the hepatic artery 

 encircled by its plexus; 11, The splenic art.-ry, ditt" : I'.', The g.-ustric artery, 

 ditto; 1 '., The anterior mesenteric artery, ditto; 14, Kidney, elevated, receiving 

 the renal plexus; 15, The suprarenal capsule with its }>lexus; 16, Lumbo-aortic 

 |il>:\ii>; 17. .ortivn <>f the '/m/i//-li<- chain; 18, Posterior mesenteri<: 



|iloxti-; 1'.*, Branches from it passing to the anterior m uteric plen: 



Spermatic |.|.-\iis; 21, Branches going to the pelvic ]>\<-\-. ///..;//,, ,./ 



the syin/xit/K ti: c/i-iin . plexus; 24, Afferent branches furni.-hi-d t.. th.- 



sympathetic by tho spinal pair>; -4', Th- cord win -i\ of tin- 



ram:. ^ ijx-rior laryngeal ; the pharyngeal 



ni-an. i, U seen to be detached from the pneumugastric a littl.- bwOW ; -7, lutVrior 

 laryn^'oal nerve of the right side; 28, That of the left side at tin- )H.iut where 

 it in- nds rouud the arch of the aorta; 29, NT\.' of the bronchial pli-xua; SO, 



rior opsophage.il branch: .'!!, Inf.-rior ditto; lij, Sjimul nerte ; 33, i 

 glossal n:i -...iso-pharymjeal uerve. represented t-.u thick. 



3 B 



