NERVOUS SYSTEM, 93 



sensibility is so little increased as not to enlarge the ner- 

 vous trunks. 



Q. In what abnormal condition did Bichat once find 

 the sciatic nerve? 



*#. With the veins of the nerve in a varicose state. 



Q. Do the cerebral nerves affect the organic sensibility 

 of textures? 



/?. They do not; that property of the textures is be- 

 yond the sphere of those nerves. 



Q. Recapitulate the functions over which organic sen- 

 sibility presides? 



#. It supports capillary circulation; secretion; exhala- 

 tion; absorption; nutrition. 



Q. What excites these functions? 



4/2. The fluids excite the organic sensibility of the so- 

 lids, which last in action exercise insensible organic con- 

 tractility. 



Q. What general considerations induce the belief that 

 the nerves of animal life do not preside over and influence 

 these functions? 



#. They are said to receive no impulse from the nerves 

 of animal life, because no filaments from these nerves go 

 to the capillaries; some of these organic functions are 

 most active during sleep, at which time the animal ner- 

 vous system is quiescent; and cartilages which receive no 

 nerves have nutrition as well as other parts. 



Q. Over what diseases do organic sensibility, and in- 

 sensible organic contractility preside? 



#. Over tumours, dropsies, morbid sweating, haemor- 

 rhagies, disorders of secretion, and such like affections. 



Q. What diseases arise from disordered animal sensi- 

 bility and contractility ? 



