Stowell.] I'J^ [July 15, 



(Fig. 8 and 11, 5^). This ramulus is largely if not exclusively oeso- 

 phageal and joins in Px. pharyngeus ; the caudal or recurrent portion is 

 reflected caudad upon the oesophagus. 



Gastric nerves : Caudad of the diaphragm the dorsal gastric 

 nerve splits into several terminal ramuli, the longest of which terminates 

 in ganglion semi-lunare of the great solar plexus, Px. Solaris; near the 

 cardia numerous filaments are distributed to the cardia ; oflFsets supply the 

 lesser curvature of the stomach, the plexus around A. coronaria ventriculi, 

 and the dorsal surface of the stomach ; ramuli may be traced to the plexus 

 around A. hepatica (Px. hepaticus), A. splenica (Px. splenicus), A. mesen- 

 terica superior (Px. mesarseicus). At the cardia, terminal filaments of the 

 ventral trunk are distributed to the lesser curvature of the stomach, a 

 few join terminal filaments of the dorsal trunk (Fig. 13), and others still 

 maybe traced to the great solar plexus, from which ramuli enter the 

 gastro-hepatic omentum and join the hepatic plexus. This anastomosis of 

 the dorsal and ventral trunks in the solar plexus constitutes the "memor- 

 able loop of Wrisberg." 



SUMMARY. 



A. Anatomical. 1. Origin — 13-14 filaments along a line ventro- 

 laterad of Cp. restiforme, and by 4^6 filaments ventrad of oliva. 



2. Foramen of exit — foramen lacerum posterius. 



3. Ganglia — G. jugulare, in the proximal end of foramen of exit — 

 G. inferius, 15mm. peripherad. 



4. Relations of ganglia— G. jugulare, with NN. facialis (VII), 

 glosso-pharj^ngeus (IX), accessorius (XI), sympathicus ; G. inferius, with 

 NN. glosso-pharyngeus (IX), accessorius (XI), hypoglossus (XII), 

 pharyngeus, laryngeus superior, sympathicus. 



5. Px. gangiiformis— the 5 mm. of trunk peripherad of G. jugu- 

 lare ; it is formed by accessory portion of N. accessorius, anastomotic 

 filaments between NN. vagus and accessorius, filaments to N. pharyngeus, 

 and N. sympathicus. 



6. Princiiial rami — respective origins and general distribution : Rm. 

 auricularis, G. jugulare to N-. facialis ; N. pharyngeus, Px. gangii- 

 formis to Px. pharyngeus -and oesophaggeus ; N. laryngeus superior, G. 

 inferius to larynx ; N. laryngeus inferior, N. vagus near arch of A. aorta 

 to trachea and oesophagus ; Rm. cardiaci, trunk of N. vagus proximad 

 of base of heart to Px. cardiaci; Rm. pulmonares, trunk of N. vagus 

 proximad of root of lungs to Px. pulmonares ; anastomotic filaments to 

 N. sympathicus. 



7. Difiircation — dorso-latcrad from roots of lungs into hiteral and 

 mesal rami. 



8. Formation of nerve trunks— dorsal trunk by union of lateral 

 rami = dorsal gastric nerve (N. gastricus dorsalis) — ventral trunk by 

 union of mesal rami ^= ventral gastric nerve (N. gastricus ventralis). 



9. Tcriiiii»ation — ganglia semi-lunaria of Px. Solaris in loop of 

 Wrisberg. 



