NERVE-TISSUE. 



309 



morbid change of ganglionic elements in this center. Such facts, compared 

 with the appearance of muscular movements in the embryo upon the formation 



a a * 



JIT 



FIG. 131. DIAGRAM OF NERVE CONDUCTION. 



MG, motor ganglionic element; SG, sensitive ganglionic element; G, offshoot to the gray 

 substance of the spinal cord; B, offshoot to the gray substance of the brain; CO, offshoot 

 to analogous ganglionic elements for coordinate sensation and motion ; A C, axis-cylinder, 

 transformed into MN, a medullated nerve-fiber ; CO, cornea corpuscle in connection with 

 the sensitive ganglionic element ; M , striped muscle, with MH, the motor hill, in connection 

 with the motor ganglionic element. 



of motor ganglionic elements in the spinal cord, would also indicate that every 

 group of muscles has, to a certain extent, independent centers in the gray 

 substance. 



