

SUPEEIOE CEEVICAL GANGLION. 



757 



2. Heart. N. Cardiacus Superior. The superior cardiac branch is a slender 

 nerve which, on the right side, descends behind the large vessels into the thorax 

 to join the deep cardiac plexus. On the left side the course of the nerve is similar 

 in the neck, but in the superior mediastinum it passes between the left common 

 carotid and subclavian arteries, and across the aortic arch, to join with the inferior 

 cervical cardiac branch of the vagus in the formation of the superficial cardiac 

 plexus. In their course both nerves form connexions with the other cardiac 

 nerves of the sympathetic, and with cardiac and other branches of the vagus 

 (recurrent and external laryngeal). 



3. Vessels. (a) Nn. Carotici Extern!. The external carotid branches pass 



Internal carotid artery Internal carotid plexus 



Cavernous plexus 



Emergence of first cervical nerve v 

 Anterior ramus of first cervical nerve -- 



Pharyngeal branch of vagus 



/ Glossopharyngeal nerve 



/ / Stylopharyngeus 



iray ramus communicans from superior 

 - ganglion to first cervical nerve' 



Pharyngeal branches----. .-- 



Superior cervical ganglion 

 iray ramus communicans from superior 

 rvical ganglion to second cervical nerve 

 Anterior ramus of second cervical nerve* 



iray ramus communicans from superior 

 i-rviciil ganglion to third cervical nerve" 



iray ramus communicans from superior 

 rvical ganglion to fourth cervical nerve" 



Anterior ramus of third cervical nerve- 



Ulterior ramus of fourth cervical nerve--- 



Anterior ramus of fifth cervical nerve 



: iac branches from cervical sympathetic -'^j. 



i: mus communicans from middle cervical f Jr I 



ganglion to 5th cervical nerve 



Anterior rain us of 6th cervical nerve 



i; mus coinmunicans from middle cervical _ 

 ganglion to 6th cervical nerve 



Vertebral plexus- - 



iterior ramus of seventh cervical nerve -, 

 iray ramus communicans from inferior 



cervical ganglion to 7th nerve'"' 

 ray rami communicantes from inferior 

 cervical ganglion to 8th cervical nerve"" 

 interior ramus of 8th cervical nerve/ 

 Anterior ramus of first thoracic 11 



" "Pharyngeal plexus 

 External carotid plexus 

 Superior laryngeal 

 'branch of vagus 

 -Internal laryngeal 



"'External laryngeal 



- Common carotid artery 



-'Thyreoid gland 



. Plexus on inferior 

 thyreoid artery 



Middle cervical ganglion 



Ansa subclavia 



Cardiac branches froi 



cervical sympathetic 



_ .Inferior cervical 

 ganglion 



Subclavian artery 



Cardiac branches from 

 cervical sympathetic 



Superior thoracic ganglic 



FIG. 637. DISTRIBUTION OF THE SYMPATHETIC IN THE NECK. 



wards to the external carotid artery, and form the plexus caroticus externus 



xternal carotid plexus), which supplies offsets to that artery and its branches, 



11 as to the glomus caroticum (O.T. inter-carotid body). From the subordinate 



xuses on the external maxillary and middle meningeal branches of the 



-rtery sympathetic fibres are supplied to the submaxillary ganglion and otic 



1 ganglion, respectively. 



(V) N. Caroticus Interims. The internal carotid branches form an upward pro- 



ition of the ganglion which applies itself in the form of bundles of nerve-fibres 



internal carotid artery as it enters the carotid canal in the temporal bone. 



Branches separate into lateral and medial parts, which form plexuses investing 



Artery in the cranium. The lateral division forms the inferior or internal 



)tid plexus (pi. caroticus internus) ; the medial division gives rise to the superior 



496 



