274 ANIMAL FORCES. [ii. 



non-conceptional internal impressions, although it is excited 

 for the most part by unfelt external impressions. This is 

 shown by the development of various spasmodic phenomena 

 involving the bladder. 



538. The nerve-actions of non-conceptional internal im- 

 pressions in other viscera, as the spleen, pancreas, are either 

 the same as those of the glands, blood-vessels, &c., or else 

 experimental researches have not thrown light on the subject. 



539. The organs of the senses are the seat of the same 

 nerve-actions, as the muscular system generally; it is there- 

 fore not necessary to give special illustrations. 



540. The sexual functions in animals not far removed from 

 quadrupeds, are undoubtedly, for the most part, nerve-actions. 

 The seminal emission, which takes place in epilepsy, and in 

 which all sensation and consciousness is abolished, is of this 

 nature, as also the sexual congress of decapitated animals 

 before alluded to (481). 



