THE NEKVOUS SYSTEM. 



651 



FIG. 390. Diagrammatic view of the 

 Sympathetic cord of the right side, show- 

 ing its connections with the principal 

 cerebro-spinal nerves and the main prse- 

 aortic plexuses. j. (From Quain's 

 Anatomy.) 



Cerebro-spinal nerves. VI., a portion 

 of the sixth cranial as it passes through 

 the cavernous sinus, receiving two twigs 

 from the carotid plexus of the sympathe- 

 tic nerve; O, ophthalmic ganglion con- 

 nected by a twig with the carotid plexus; 

 M, connection of the spheno-palatine 

 ganglion by the Vidian nerve with the 

 carotid plexus; C, cervical plexus; Br, 

 brachial plexus; D 6. sixth intercostal 

 nerve; D 12, twelfth; L 8, third lumbar 

 nerve; S 1, first sacral nerve; S3, third; 

 S 5, fifth ; Or, anterior crural nerve ; Or 7 , 

 great sciatic ; pn, vagus in the lower part 

 of the neck; r, recurrent nerve winding 

 round the subclavian artery. 



Sympathetic Cord.-c, superior cervi- 

 cal ganglion; c', second, or middle; c". in- 

 ferior: from each of these ganglia cardiac 

 nerves (all deep on this side) are seen de- 

 scending to the cardiac plexus; d 1, 

 placed immediately below the first dorsal 

 sympathetic ganglion; d 6, is opposite 

 the sixth; 1 1, first lumbar ganglion; c a. 

 the terminal or coccygeal ganglion. 



Prceaortic and Visceral Plexuses. pp, 

 pharyngeal, and, lower down, laryngeal 

 plexus; pi, post-pulmonary plexus 

 spreading from the vagus on the back of 

 the right (bronchus; ca, on the aorta, the 

 cardiac plexus,, towardswhich, in addition 

 to the cardiac nerves from the three cer- 

 vical sympathetic ganglia, other branch- 

 es are seen descending from the vagus 

 and recurrent nerves; co, right or poste- 

 rior and co', left or ant. coronary plexus; 

 o, cesophageal plexus in long meshes on 

 the gullet; sp, great splanchnic nerve 

 formed by branches from the fifth, sixth, 

 seventh, eighth,and ninth dorsal ganglia; 

 -f, small splanchnic from the ninth and 

 tenth; -f -f, smallest or third splanchnic 

 from the eleventh ; the first and second of 

 these are shown join ing the solar plexus, 

 so; the third descending to the renal 

 plexus, re; connecting branches between 

 the solar plexus and the vagi are also rep- 

 resented; pn', above the place where the 

 right vagus passes to the lower or pos- 

 terior surface of the stomach ; pn", the 

 left distributed on the anterior or upper 

 surface of the cardiac portion of the or- 

 gan: from the solar plexus large branch- 

 es are seen surrounding the arteries of 

 the coeh'ac axis, and descending to m s, 

 the sup. mesenterie plexus; opposite to 

 this is an indication of the suprarenal 

 plexus; below r e (the renal plexus), the 

 spermatic plexus is also indicated ; a o, on 

 the front of the aorta, marks the aortic 

 plexus, formed by nerves descending 

 from the solar and sup. mesenterie plex- 

 uses and from the lumbar ganglia; mi, 

 the inf. mesenterie plexus surrounding 

 thecorresponding artery ; hy, hypogastric 

 plexus placed between the common iliac 

 vessels, connected above with the aortic 

 plexus, receiving nerves from the lower 

 lumbar ganglia, and dividing below into 

 the right and left pelvic or inf. hypogas- 

 tric plexuses; pi, tne right pelvic plexus; 

 from this the nerves descending are join- 

 ed by those from the plexus on the sup. 

 hemorrhoidal vessels, mi', by nerves from 

 the sacral ganglia, and by visceral 

 nerves from the third and fourth sacral 

 spinal nerves, and there are thus formed 

 the rectal, r osteal, and other plexuses, which ramify upon the viscera, as towards ir, and v the 

 rectum and bladder. 



