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A few months of absolute rest, good diet, ale, fresh beef and vegetables restored them to perfect health. In all probability incessant use of a part flushes with blood the nerve-centres which furnish it with motor energy, so that excessive work may bring about a state of congestion, owing to which the nerve-centre becomes badly nourished, and at last strikes work.
He knew that walking in his present state would be painful, and he declined to submit to any more pain just because some party unknown was apparently being murdered in his library. It was not until the shrill barking of the dog Aida penetrated right in among his nerve-centres and began to tie them into knots that he found himself compelled to descend.
Dewey places it in capital letters in the frontispiece of his book. But even when wasting to this extent has occurred the curious and significant fact is emphasized that the brain and nerve-centres may not have wasted at all. The controlling nervous system thus does not lose its powers till the very last.
In entering the mouth the sting did not reach the cervical ganglia, or sudden death would have ensued and we should have before our eyes corpses which would go bad in a few days, instead of fresh carcases in which traces of life remain manifest for a long time. The cephalic nerve-centres have been spared. What is wounded then, to procure this profound inertia of the poison-fangs?
I am also told: "It is possible, if it comes to that, for the sting to be delivered in the neighbourhood of the nerve-centres; in a victim at most three or four centimetres long, distances are very small. But a casual there or thereabouts is a very different thing from the precision of which you speak." Oh, they are "thereabouts," are they? We shall see! You want figures, millimetres, fractions?
These insect-killers, who live on their prey, strike the game dead instantaneously by stinging the nerve-centres of the neck; the paralyzers, on the other hand, who wish to keep the food fresh for their larvae, destroy the power of movement by stinging the game in the other nerve-centres. Both of them attack the nervous chain, but they select the point according to the object to be attained.
I need not here remind the reader of the wasps' and bees' genius for building, the social and economic organization of the hive and the ant-hill, the spider's snares, the eumenes' nest and hanging egg, the odynerus' cell with its neat stacks of game, the sacred beetle's filthy but ingenius ball, the leafcutter's faultless disks, the brick-laying of the mason-bee, the three dagger-thrusts which the aphex administers to the three nerve-centres of the cricket, the lancet of the cerceris, who paralyses her victims without killing them and preserves them for an indefinite period as fresh meat, nor a thousand other features which it would be impossible to enumerate without recapitulating the whole of Henri Fabre's work and completely altering the proportions of the present essay.
She was surprised when, instead of frowning, as was his invariable practice when bracing himself for composition, he bestowed upon her a sweet, slow smile. All that was maidenly and defensive in Miss Pillenger leaped to arms under that smile. It ran in and out among her nerve-centres. It had been long in arriving, this moment of crisis, but here it undoubtedly was at last.
But here the law of habitual action asserted itself, and it was necessary to overcome the remembrance of the disease by the nerve-centres. It is plain that the higher nerve-centre remembers the idea or fact because it is impressed by ideas and facts, precisely as the lower spinal nerve-centres in the frog remember irritations and movements which have impressed them.
A shock which disturbs its nerve-centres, an abrupt fright which seizes upon it reduce it to a state of somnolence like that of the bird which is swung for a second or two with its head under its wing. A sudden terror sometimes deprives us human beings of the power of movement, sometimes kills us.
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