422 ANATOMY IN A NUTSHELL. 



(b) tn the thyroid gland, (c) to the submaxillary ganglion which comes from 

 the sympathetic around the facial artery, (d) to the geniculate ganglion of the 

 seventh and the otic ganglion of the fifth. 



(i. Sends branches to ligaments and bonis. 



7. Sends branches to the internal carotid artery which divides into two 

 -i ts, those on its inner side are called cavernous plexus, those on the other 

 side carotid plexus. The cavernous plexus sends off (a) branches to the 

 pituitary body, (l>) to the dura mater on the sphenoid bone, (c) to the mucous 

 membrane of the sphenoidal sinus, (d) to the third nerve, and the fourth nerve, 

 and the ophthalmic nerve, (e) to the carotid artery, (f) to the ciliary ganglion. 



The carotid plexus gives off (a) small deep petrosal to tympanic plexus. 

 (h) greal deep petrosal to Vidian nerve, (c) to the Gasserian ganglion of the 

 tilth nerve and (e) to the sixth n#rve. 



LESSON CXXI. 



The middle cervical ganglion is often absent. It is triangular in shape and 

 is made by the coalescence of two ganglia and it sends (a) two gray rami com- 

 municantes to the fifth and sixth spinal nerves, (b) branches to the thyroid 

 gland along the inferior thyroid artery, (c) middle cardiac nerve which is be- 

 hind or in front of the first part of the subclavian artery, joins the upper 

 cardiac nerve, recurrent laryngeal nerve and ends in the dee}) cardiac plexus. 



On the left side this nerve enters the thorax between the left com- 

 mon carotid and the left subclavian artery. It sends an ascending branch to 

 join the superior cervical ganglion and one inferior to join the inferior cervical 

 ganglion. It also sends a branch in front of the subclavian artery to join this 

 ganglion called ansa Yieussens. 



The inferior cervical ganglion is irregular. In front is the vertebral artery, 

 behind a space between the transverse process of the last cervical and the first 

 i lorsal. It is very close to the first dorsal ganglia with which it sometimes unites. 

 Its branches are; 



(a) Two gray rami to the seventh and eighth cervical ganglia. 



(b) Branches to the vertebral artery which join a branch from the first 

 dorsal to make the vertebral plexus which surrounds the vertebral artery and 

 going about it into the circle of Willis. This plexus joins the roots of the spinal 

 nerves in the neck. 



;) To the inferior cervical cardiac which sometimes comes from the first 

 dorsal; it joins the middle cardiac nerve and recurrent laryngeal nerve and 

 descends on the trachea to the d< ep cardiac plexus. On the left side this nerve 

 is occasionally joined to the middle cervical to form a common trunk. 



LESSON CXX II. 



The thoracic ganglia are eleven in number; the first one is called stellatum. 

 [1 i- situated on the neck of the first rib. The second to the ninth are situated 



on the heads of the ribs. The tenth and eleventh are on the vertebras. They 

 receive white rami communicantes from the spinal nerves and give off gray rami. 

 Each of these ganglia give off rami efferentes which divide into external and 



