38 IRRITATIVE MOTIONS. SECT. VII. r. 



luntary motions are thofe contractions of the muf- 

 cular fibres, or of the organs of fenfe, that are im- 

 mediately confequent to this exertion or change of 

 the fenforium. 



4. Affociate motions. That exertion or change 

 of the fenforium, which accompanies fibrous mo- 

 tions, either limply fubfides, or is fucceeded by 

 fenfation or volition, or it produces other fibrous 

 motions ; it is then termed affociation, and the 

 affociate motions are thofe contractions of the muf- 

 cular fibres, or of the organs of fenfe, that are im- 

 mediately confequent to this exertion or change of 

 the fenforium. 



SECT. VII. 



OF IRRITATIVE MOTIONS. 



I. i. Some mufeular motions are excited by perpetual 

 irritations, i. Others more frequently by fenfations. 

 3. Others by volition. Cafe of involuntary ft retch- 

 ings in paralytic limbs. 4. Some fenfual motions are 

 excited by perpetual irritations. 5. Others more fre- 

 quently by fenfation or volition. 



II. i. Mufeular motions excited by perpetual irrita- 

 tions occajionally become obedient to fenfation and to 

 volition. 2. And the fenfual motions. 



III. i. Other mufeular motions are ajfociated with the 

 irritative ones. 2. And other ideas with irritative 

 ones. Of letters, language, hieroglyphics. Irrita- 

 tive ideas exift without our attention to them. 



vr f " -jb; V> ,Vj.".-..^.-^--.--vfe.:r'.fii- Tj$fb ,*'* 



I. i. MANY of our mufeular motions are ex- 

 cited by perpetual irritations, as thofe of the heart 



and 



