FUNCTIONS OF RELATION NERVOUS SYSTEM. 49 



FlG. 27. 



FIG. 26. 



CEREBROSPINAL SYSTEM. 

 M, medulla oblongata ; 

 C 1 to 8, cervical nerves ; 

 D 1 to 12, dorsal nerves ; 

 L 1 to 5, lumbar nerves ; 

 S 1 to 6, sacral nerves. 



A BACK VIEW OF THE BRAIN AND SPINAL 



NERVES. 1, cerebrum; 2, cerebellum; 

 3, spinal cord ; 4, nerves of the face ; 5, 

 brachial plexus of nerves; 6, 7, 8, 9, 

 nerves of the arm; 10, nerves that pass 

 under the ribs; 11, lumbar plexus of 

 nerves ; 12, sacral plexus of nerves ; 13, 

 14, 15, 16, nerves of the lower limbs. 

 5 



