226 MUSCULAR SYSTEM, 



This irritability actuates a muscle from contractions down 

 to oscillations. 



Q. What tends most to develope the sympathies of 

 this system? 



.#. The great development of animal sensibility in any 

 organ; hence it is that pain so often produces involuntary 

 animal contractility of the muscles, or, in other words, 

 spasms. 



Q. Is this sympathy direct between the organ and the 

 muscles? 



ft. The pain acts on the brain, and that reacts on the 

 muscles. 



Q. Do the organic sensibilities and contractilities ra- 

 diate sympathetic reciprocity through the brain on the 

 muscles? 



*#. No; none but the animal sensibility and contrac- 

 tility are sympathetically operative through the brain; the 

 organic vital properties operate directly from organ to 

 organ. 



Q. Is there an anatomical or physiological reason for this? 



/?. There is; for the brain does not influence organic 

 vital properties through the nerves, but it does affect the 

 animal properties of the muscle. 



Q. State instances of animal sensibility in the muscular 

 system sympathetically excited. 



#. Take as instances of this the pain, languor, and las- 

 situde of fever. 



Q. Do convulsive motions indicate disease of the mus- 

 cles? 



#. They do not; they indicate cerebral excitement as 

 the varieties of the pulse indicate affections of the heart 



