26% DISEASES CLASS II. 1. 7. 1. 



ORDO I. 



Increased Sensation. 



GENUS VII. 



With increased Jlclions of Organs of Sense. 

 SPECIES. 



1. Delirium febrile. Paraphrosyne. The ideas in delirium 

 consist of those excited by the sensation of pleasure or pain, 

 which precede them, and the trains of other ideas associated 

 with these, and not of those excited by external irritations or by 

 voluntary exertion. Hence the patients do not know the room 

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

 they any voluntary exertion, where the delirium is complete; so 

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

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

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



By the above circumstances it is distinguished from madness, 

 in which the patients well know the persons of their acquaintance, 

 and the place where they are; and perform all the volun- 

 tary actions with steadiness and determination. See Sect. 

 XXXIV. 2. 8. 



Delirium is sometimes less complete, and then a new face and 

 louder voice stimulate the patient to attend to them for a few mo- 

 ments; and then they relapse again into perfect delirium. At 

 other times a delirium affects but one sense, and the person thinks 

 he sees things which do not exist; and is at the same time sen- 

 sible to the questions which are asked him, and to the taste of 

 the food which is offered to him. 



This partial delirium is termed a hallucination of the disor- 

 dered organ; and may probably arise from the origin of one nerve 

 of sense being more liable to inflammation than the others; that 

 is, an exuberance of the sensorial power of sensation may affect 

 it; which is therefore thrown into action by slighter sensitive 

 catenations, without being obedient to external stimulus, or to 

 the power of volition. 



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

 circumstance, as of those in our dreams; namely, to the defect 

 or paralysis of the voluntary power; as in hemiplegia, when one 

 side of the body is paralytic, and thus expends less of the sensorial 

 power, the limbs on the other side are in constant motion from 



