362 NORMAL HISTOLOGY AND ORGANOGRAPHY. 



2. In non-striated and in heart muscle the nerve 

 termination is more simple. The muscle is supplied 

 with neurons from the sympathetic system, most of 

 which are of the non-medullated variety. These 

 fibers branch repeatedly to form an extensive 



Nerve-end 



brush. 



-- So-called gr 

 ular-sole. 



^ Muscle fiber. 



Fig. 253. Motor endings in striated voluntary muscles. 

 Pseudopus Pallasii. As a consequence of the treatment the arbo 



From 



irborescence 



is shrunken and interrupted in its continuity. The end plate is in con- 

 nection with two nerve branches (Bohm and Davidoff). 



primary plexus surrounding the muscle bundles*. 

 From this plexus non-medullated fibers, that is, 

 just the axis cylinders, penetrate the heart muscle, 

 or the involuntary muscle, where they anastomose 

 to form a delicate secondary plexus, from which lat- 

 eral short twigs pass to end in minute dilatations or 

 granules upon the muscle cells. 



