CHAPTER XI. 

 PERIPHERAL NERVE TERMINATIONS. 



Physiologically, nerve endings may be classified as 

 motor or sensory. 



MOTOR NERVE ENDINGS. 

 (The Telodendria of Nerve Fibers in Muscle Tissue.) 



i . In Striated Muscle. The nerve endings in stri- 

 ated muscle are called muscle-end plates, or sole plates. 

 In the higher vertebrates these are found in the 

 muscle sarcoplasm just beneath the sarcolemma of 

 each muscle fiber. A motor nerve fiber as it ap- 

 proaches its termination becomes much branched 

 so as to innervate from ten to twenty muscle fibers. 

 The axis cylinder enters the sarcoplasm where it im- 

 mediately terminates in a web-like, flat end-brush with 

 numerous dilatations. The axilemma, or Henle's 

 sheath, is continuous around the brush. The me- 

 dullary layer stops short at the level of the sarco- 

 lemma; that is, at the surface of the sarcoplasm. 

 The neurolemma is continuous with the sarcolemma 

 of the muscle fiber. The adjacent sarcoplasm of the 

 muscle fiber is granular and a liberal supply of muscle 

 nuclei is also present in the proximity, which results 

 in an elevation of the muscle fiber at the point of 

 nerve contact known as Doyer's elevation. 



