tfz DISEASES • Class II. i. 7. u 



ORDO I. 



htcreafed Se?ifation. 

 GENUS VII. 

 With increafed Affiion of the Organs of Senfe. 



SPECIES. 



I. Delirium febrile. Paraphrofyne. The ideas in delirium 

 confift of thofe excited by the fenfation of pleafure or pain, 

 which precedes them, and the trains of other ideas affociated 

 with thefe and not of thofe excited by e xternal irritations or by 

 voluntary exertion. Hence the patients do not know the room 

 which they inhabit, or the people who furround them ; nor have 

 they any voluntary exertion, where the delirium is complete \ fo 

 that their efforts in walking about a room or riling from their 

 bed are unfteady, and produced by their catenations with the im- 

 mediate affections of pleafure or pain. See Section XXXIII. 1. 4. 



By the above circumftances it is diilinguifhed from madnefs, 

 in which the patients well know the perfons of their acquaint- 

 ance, and the place where they are *, and perform all the volun- 

 tary actions with fteadinefs and determination. See Seel. 

 XXXIV. 2. 2. 



Delirium is fometimes lefs complete, and then a new face 

 and louder voice flimulate the patient to attend to them for a 

 few moments ; and then they rdapfe again into perfect delirium. 

 At other times a delirium affects but one fenfe, and the perfon 

 thinks he fees things which do not exift ; and is at the fame 

 time fenfible to the queftions which are afked him, and to the 

 tafte of the food which is offered to him. 



This partial delirium is termed a hallucination of the difor-. 

 dered organ ; and may probably arife from the origin of one 

 nerve of fenfe being more liable to inflammation than the others \ 

 that is, an exuberance of the fenforial power of fenfation may af- 

 fect it ; which is therefore thrown into action by flighter fenfi- 

 tive catenations, without being obedient to external flimulus, or 

 to the power of volition. 



The perpetual flow of ideas in delirium is owing to the fame 

 eircumftancd, as of thofe in our dreams; namely, to the defect: 

 or paralyfis of the voluntary power 5 as in hemiplegia, when one 

 fide of the body is paralytic, and thus expends lefs of the fenforial 

 power, the limbs on the other fide are in comtant motion from 



the 





