CLASS IV. 1. 3. 1. OF ASSOCIATION. 39'3 



ORDO I. 



Increased Associate Motions. 



GENUS III. 



Catenated with Voluntary Motions. 

 SPECIES. 



1 . Deglutitio invita. When any one is told not to swallow his 

 saliva, and that especially if his throat be a little sore, he finds a 

 necessity of immediately swallowing it; and this the more cer- 

 tainly, the more he voluntarily endeavours not to do so. 



In this case the voluntary power exerted by our attention to the 

 pharynx renders it more sensible to irritation, and therefore occa- 

 sions it to be more frequently induced to swallow the saliva. 

 Here the irritation induces a volition to swallow it, which is 

 more powerful than the desire not to swallow it. See Sect. 

 XXIV. 1.7. So in reverie, when the voluntary power was ex- 

 erted on any of the senses, as of sight or taste, the objects of those 

 senses became perceived; but not otherwise. See Sect. XIX. 

 6. This is a troublesome symptom in some sore throats. 



M. M. Mucilage, as sugar and gum arabic. 



Warm water held in the mouth frequently, as a fomentation to 

 the inflamed throat. 



2. Nictitatio invita. Involuntary winking with the eye-lids, 

 and twitchings of the face, are originally induced by an endea- 

 vour to relieve some disagreeable sensations about inflamed eyes, 

 as the dazzling of light; and afterwards these motions become 

 catenated with other motions or sensations, so as not to be go- 

 verned by the will. Here the irritation first produces a volition 

 to wink, which by habit becomes stronger than the anti-volition 

 not to wink. 



This subject is rendered difficult from the common acceptation 

 of the word volition, including previous deliberation, as well as 

 the voluntary exertion, which succeeds it. In the volitions here 

 spoken of, there is no time for deliberation or choice of objects, 

 but the voluntary act immediately succeeds the sensation which 

 excites it. 



M. M. Cover the affected parts with a sticking plaster or a 

 blister. Pass a fine needle and thread through a part of the skin 

 over the muscle, which moves, and attach the other end of the 

 thread by a sticking plaster to a distant part. An issue behind 



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