770 



THE NERVOrS SYSTEM 



nerve. The three striutures are enclosed in a conniiDii sheatli derived froin the 

 deep cervical fascia. 



In their course throuiih the thora.x tlu- nerves of the left and right sides differ 

 in some respects from each other. 



Fig. 451.— Distribution of thk Pneumogastric Nervk, viewed from hehind. (Krause.) 



Stylo-hyoid Ligamentuin pharyngeum 



Posterior belly of 

 digastric 



Sterno-mastoid 



Kectus capitis 

 anticua major 



Stylo-pharyngeus 



Stylo-glossuB 



Internal pterygoid 



SUPERIOR 

 CERVICAL 

 GANGLION 



Middle constrictor 



Common carotid 

 artery 



Inferior constrictor 



GANGLION 

 THYROWEUM 

 (VARIETY) 



THYROID GLAND 



Inferior thyroid 

 artery 

 Subclavian artery 



RECURRENT 

 LARYNGEAL 

 NER VE 



Thoracic aorta 



Cru8 of diaphragm 



Infernal carotid 

 artery 

 - RIGHT 



SYMPA TIIETIC 



Occipital arlerii 



— Posterior belly of 

 digastric 



_ DESCENDENS 

 HYPOGLOSSI 



Common carotid 

 iirfeni 



Sterno-mastoid 



TWIG OF 

 RECURRENT 

 LARYNGEAL TO 

 PHARYNGEAL 

 PLEXUS 



Thyroid axis 



INFERIOR 

 CERVICAL 

 GANGLION 



RECURRENT 

 LARYNGEAL 



PLEXUS G ULM, 



RIGHT 

 PNEUMOGASTRIC 



\ 



The right vagus nerve })asses in front of the first stage of the subclavian artery 

 between the latter and the right innominate vein, and then, inclining backwards, 



