262 



NERVOUS SYSTEM. 



THE SPINAL NERVES, 31 PAIRS. 



8 CERVICAL, 12 DORSAL, 5 LUMBAR, 5 SACRAL, i COCCYGEAL. 

 N. B. Read from the Black Type outwards to left and right. 



to muscles and f Ext. Br. ' 

 skin of back. \Int. Br. . 



{Each ^ 

 Spinal Nerve LANT. DIVISION, to 

 divides into 



J Plexuses, etc. 



Post. Div. ofzd N. 

 Post. M. of head, etc. 

 Complexus Muscle. 

 Skin of occiput. 



POST. 

 Div. 



f ist Cervical 

 \ Nerve. 

 t Sub-occipital 



ANT. 

 Div. 



Brs. (3) to Recti cap. Muscles. 



2 Cerv. N. 



Commurfg Vagus N. 

 Brs. to ' Hypogl. N. 



Sup. Cerv. Gang. 

 Br. to Occip-atloid artic'n. 



Muscles of the Back 



1 POST, f 

 "I Div. \ 



4th Cervical 

 Nerve. 



ANT. 

 Div. 



Fil. to 3d Cerv. N. 

 Fil. to 5th Cerv. N. 

 Fil. to Phrenic N. 

 Fil. to Scalenus medius. 

 .Fil. to Supra-ciavic. N. 



