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Updated: June 25, 2025
It informed me that the learned Dutchman had been struck, long before I was, by an anatomical peculiarity similar to that which the larvae of the Cetoniae and Anoxiae had shown me in their nerve-centres.
There was no disease, as we understand the term. In particular, there was no decay of the nerve-centres. Alresca was well in good health. What he lacked was the will to live that strange and mystic impulse which alone divides us from death.
In either form of work, physical or mental, the will acts to start the needed processes, and afterwards is chiefly regulative. In the case of bodily labor, the spinal nerve-centres are most largely called into action. Where mental or moral processes are involved, the active organs lie within the cranium.
The murderess chooses the under part of the chin as the point attacked in order to strike the principal nerve-centres, the cephalic ganglia, and thus to do away with life at one blow. When this vital seat is poisoned by the toxin, death is instantaneous.
We insist only on the necessity of simultaneous and parallel changes in muscles, nerves, and nerve-centres; though what is true of these is true, in greater or less degree, of all the other organs.
A marked rise of temperature is one of the most constant and important concomitants of acute inflammatory conditions, and the temperature chart forms a fairly reliable index of the state of the patient. The toxins interfere with the nerve-centres in the medulla that regulate the balance between the production and the loss of body heat.
They did not know how the captain at their back received his orders; they only heard the note of the whistle, with a command familiar to a trained instinct on the edge of anticipation. It released a spring in their nerve-centres. They responded as the wheels respond when the throttle is opened.
As by a telegraphic system the most distant parts of a vast railway system may be brought into harmonious working, so is it with the body by means of the nervous system. The nerve-centres correspond to the heads of the railway system, or, perhaps more correctly, to the various officials resident in some large city who from this centre regulate the affairs of the whole line.
Scientists say that the human system has two nerve-centres one in the brain, to which and from which are telegraphed all movements depending upon the will, and another in the small of the back, the centre of the involuntary operations of respiration, digestion, and so on. It may be fanciful to suppose that in the national system Washington is the one nervous centre and New York the other.
After the Ammophilae, the paralysers who multiply their lancet-thrusts to destroy the influence of the various nerve-centres, excepting those of the head, it seemed advisable to interrogate other insects which also are accustomed to a naked prey, vulnerable at all points save the head, but which deliver only a single thrust of the sting.
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