558 THE POSTERIOR PITUITARY AND THE NERVOUS SYSTEM. 



FIG. 3. SCHEMATIC REPRESENTATION OF THE LOWER MOTOR NEURON. 

 The motor cell from the ventral horn of the spinal cord, together 

 with all its protoplasmic processes and their divisions, its axis-cylinder 

 process with its divisions, side-fibrils or collaterals, and end-ramifica- 

 tions (telodendrions, or motor end-plates) in the muscle represent parts 

 of a single cell or neuron, n', Nucleolus. c, Cytoplasm showing the dark- 

 colored Nissl bodies and lighter ground-substance, d, Protoplasmic proc- 

 esses (dendrites) containing Nissl bodies. (Rarkcr.) 



