Bauhaus-Universität Weimar

12 PHYSIOLOGICAL ÆSTHETICS. 
and liver, considerable disintegration often takes place before 
the patient experiences painfid sensations. Here we have 
to deal with viscera mainly supplied with nerves from the 
sympathetic ganglia, or possessing independent systems of 
their own, and inasmuch as, in the vertebrata, the cerebro¬ 
spinal system is the sole seat of consciousness, it follows that 
Pain can only be felt in these organs when the disintegration 
reaches portions of them or of adjacent tissues which are 
supplied with cerebro-spinal fibres. The inter-communica¬ 
tion between the two systems is, however, so intimate and 
intricate that internal diseases exhibit the greatest apparent 
capriciousness in their painful or painless character. Lastly, 
direct experiment has shown that if the cut end of an 
efferent nerve in unbroken connexion with the brain be 
irritated, no consciousness of any sort ensues. We may 
therefore add to our previous rough generalization the limit¬ 
ing clause—provided the tissue be supplied with afferent 
cerebro-spinal nerves in unbroken connexion with the 
brain. 
But does this generalization include all classes of Pains, 
and if not, to which particular species does it apply ? Pro¬ 
fessor Bain has well divided Pains into two main classes, 
the Massive and the Acute. The former are those which 
arise from affections of the whole organism, or large tracts 
of it, and are weak in intensity: the latter, those which 
arise from affections of special limited areas, and are strong 
in intensity. Now the above enumerated Pains, which have 
for their physical antecedent a disintegration of tissue, 
belong for the most part to the Acute class. It is to this
        

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