The origin and nature of the emotions; miscellaneous papers . 2. When both adrenal glands are excised and no otherfactor is introduced, the Nissl substance progressively dis-appears from the brain-cells until death. This far-reachingpoint will l)e taken up later (Tig. GO). Here our purjiose is to discuss the cause of the brain-cellchanges. We have seen that in crossed brain and bodycirculation trauma causes changes in the cells of the brainwhich is disconnected from the traumatized body by itscirculation, but which is connected with the traumatizedbf)dy by the nervous system. We have seen that
The origin and nature of the emotions; miscellaneous papers . 2. When both adrenal glands are excised and no otherfactor is introduced, the Nissl substance progressively dis-appears from the brain-cells until death. This far-reachingpoint will l)e taken up later (Tig. GO). Here our purjiose is to discuss the cause of the brain-cellchanges. We have seen that in crossed brain and bodycirculation trauma causes changes in the cells of the brainwhich is disconnected from the traumatized body by itscirculation, but which is connected with the traumatizedbf)dy by the nervous system. We have seen that adrenalincauses activation of the body connected with its l^irain bythe ner\ous sjstem, and histologic changes in the brainacted on diicctly by the adrenalin, but we found no notablebrain-cell chang(>s in the other lirain through which theproducts of metabolism have circulat(>d. In the foicgoing we find diiect evidence that the productsof metabolism aie not the princi]ial cause of the lirain-cellchanges. We shall now present evidence to show that for. 189 190 THE EMOTIONS tho most i);ut the brain-cell changes are work changes.^^hat woik? We postulate that it is the work by which theenergy stored in the brain-cells is converted intcj electric-ity or some other form of transmissiljle energy which thenactivates certain glands and nuiscles, tlius converting latentenergv into heat and motion. It has chanced that certain •- -?<?) 1 V i^fi^ \^ © #1! ArcL frnni CcrcltflliiTii of ElectriciMih —:iL ^ ?!.,0 <h ^ j-^ f,^ u ;f ? , Area frwiiL |:xIn Fi<_;. (jl.— ot- Ijraix-cklls of lrsii Caisi;!) nv Ex-penditure OF ExERov IX Makixi; ; for stoiingand discharging electricity. We found work changes inthe brain-cells of electric fish after all their electricity hadbeen rapidl
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