86 NERVOUS SYSTEM. 



Q. what are the nervous trunks composed ? 



/#. Chords and filaments. 



Q. Do the chords of a nervous trunk communicate ? 



*ft. They do by filaments. The chords which end the 

 trunk are not composed of the same filaments which com- 

 menced them. 



Q. Why do you object to the opinion of their being 

 distinct nervous chords which serve for sensation and mo- 

 tion? 



*#. The inter-communication of the filaments forbids 

 the supposition. 



Q. What do you mean by the termination of the nerve? 



#. The point where each filament ends. 



Q. How many modes of termination have filaments ? 



tf. They have three; with other filaments of the same 

 system; with filaments of the system of ganglions, forming 

 anastomoses; and filaments lose themselves in the organs. 



Q. How are the filamentary nervous communications 

 to be distinguished? 



Jl. There are those of real anastomosis, and those of 

 juxta-position and contiguity. 



Q. Why are sympathies not exclusively ascribed to 

 nervous anastomoses ? 



J2. Because these anastomoses are rare, compared with 

 the numerous and diversified sympathies, normal and ab- 

 normal. 



Q. How many kinds of anastomosis are there? 



/#. There are three; viz. that formed by two branches 

 of different nerves; the anastomosis formed by the branches 

 of the same nerve ; and the one which arises from the union 

 'of two nerves of the same pair, or of different pairs at the 

 median line. 



