CLASS IV. 2. 3. 1. OF ASSOCIATION, 423 



ORDO II. 



Decreased Associate Motions. 



GENUS III. 



Catenated uith Voluntary Motions. 

 SPECIES. 



1. Titubatio lingum. Impediment of speech is owing to the 

 associations of the motions of the organs of speech being inter- 

 rupted or dissevered by ill-employed sensation or sensitive mo- 

 tions, as by awe, bashfulness, ambition of shining, or fear of not 

 succeeding, and the person uses voluntary efforts in vain to re- 

 gain the broken associations, as explained in Sect. XVII. 1. 10* 

 and XVII. 2. 10. 



The broken association is generally between the first conso- 

 nant and. the succeeding vowel; as in endeavouring to pronounce 

 the word parable, the p is voluntarily repeated again and again, 

 but the remainder of the word does not follow, because the asso- 

 ciation between it and the next vowel is dissevered. 



M. M. The art of curing this defect is to cause the stammerer 

 to repeat the word, which he finds difficult to speak, eight or ten 

 times without the initial letter, in a strong voice, or with an as- 

 pirate before it, as arable, or harable; and at length to speak it 

 very softly with the initial letter p, parable. This should be 

 practised for weeks or months upon every word, which the stam- 

 merer hesitates in pronouncing. To this should be added much 

 commerce with mankind, in order to acquire a carelessness about 

 the opinions of others. 



2. Chorea St. Vili. In the St. Vitus's dance the patient can 

 at any time lie still in bed, which shews the motions not to be 

 convulsive; and he can at different times voluntarily exert every 

 muscle of his body; which evinces, that they are not paralytic. 

 In this disease the principal muscle in any designed motion obeys 

 the will; but those muscles, whose motions were associated with 

 the principal one, do not act; as their association is dissevered, 

 and thus the arm or leg is drawn outward, or inward, or back- 

 ward, instead of upward or forward, with various gesticulations 

 exactly resembling the impediment of speech. 



This disease is frequently left after the itch has been too hastily 

 cured. See convulsio dolorifica, Class III. .1. 1. 6. A girl 

 about eighteen, after wearing a mercurial girdle to cure the itch, 



