NERVOUS SYSTEM. ItQ 



The system is divided into cephalic^ cet-vicai, dorsal, lumbar 

 and sacral portions. 



Cephalic consists of three ganglia of fifth nerve (see same). 

 Cervical, two ganglia. 



1. One Superior, lying in front of atlas, on carotid. 



Branches. 



Commufucating, to ninth, tenth, eleventh and twelfth nerves, 

 and fifth cervical. 



Carotid, on internal carotid, also to cavernous sinus, Vidian 

 nerve and cephalic ganglia. 



Infe?'ior carotid, to external carotid, guttural pouch, salivary 

 glands and pharynx. 



2. One Inferior, near insertion of scaleni on first rib. 

 CojHinunicating, to tenth and cervical nerves. 



Cardiac iierves, 5 ; two from left and three from right, to heart, 

 bronchi and lungs. 



Dorsal consists of 1 7 ganglia, below vertebro-costal joints. 



Branches. 



Small ones to chest and pleura. 



Great splanchnic. 



From the sixth to fifteenth, to abdomen through arch of psoas 

 parvus, and near coeliac axis, and ends in solar plextis, which sends 

 branches to stomach, hver, spleen, intestine, kidneys and their 

 capsules. 



Lesser splanchnic. 



From fifteenth, sixteenth and seventeenth, to solar plexus, «to 

 kidney and supra-renal bodies. 



Lumbar, six in number, lie on psoas parvus. 



Branches. 



Posterior mesenteric plexus, to small colon and rectum. 

 Spermatic plexus, to spermatic vessels. 

 Pelvic plexus, to pelvic viscera. 



Sacral, four in number beneath sacrum. Small branches to 

 sacral regions and vessels. 



