::;> nil-: \i:i;\ i:~: 



Near the origin of the occipital artery it crosses to tin- inner side c.f 

 that vessel, and beyond this is joined in the most intimate manner to the. 

 cervical portion of the sympathetic chain; the single cord resulting from 

 this fusion follows the common carotid artery, above which it is situated, 

 to near the entrance of the thorax. The two nerves then resume their 

 reciprocal independence, the pnenmogastric penetrating the thorax a little 



Fig. 83& 



OF THE XKIIVKS Sl'IU.N<iI.N(i FUOM Till; Ml. HI LLA OBLONGATA, AND I'Al;- 

 TICULAULY THAT OF THE PNKUMOGASTRIC, 81'INAL, HYl-OCiUXSSAL, AM- QUXSBO- 

 PHARYNGEAL. 



, Medulla obloni^ata; /, Pyramids; c, Enlargement simulating the olivary IMM|\ : 

 </, I^aternl jwsterior fissure; e, Fissure limiting sujicriorly the respiratory ti-.-ni 

 ofCh. Ik'll ; /, Corpus rest i forme ; </, Auditory nerve; /(, External oculo-inotor ; 



1, Trigeminus; j, Arciform fibres of tlie medulla oblongata. 1, E*neumogartrk : 



2, Spinal, inner root; 3, Glosso-pharyngeal ; 4, Spinal, medullary coluinu ; . r >, 

 Inferior, or anterior, root of the great hypoglossal ; 5', Its ganglinnic root : !, 

 Facial; 7, Jugular ganglion; 8, Anastomosis of the pneumogastrir with the 

 facial; 9, Ramuscule from the external branch <>C the spinal pa>Miig to tin- pin-u- 

 mogastric. From Toussaint's Thesis on the Anatnmie Coiii|>arcc ,lu \,it' 

 Pneumogastrique.' Lyons, 1869. 



below the sympathetic, in passing among the lymphatic glands existing 

 Iwjtween the two first ribs. 



lu this course, the two pneumogastrics affect nearly the same relations ; 

 though there is something special connected with the left, which corres- 

 ponds with the oesophagus towards the lower part of the neck. 



Within the chest, however, these two nerves comport themselves a 



