As the condition becomes more serious, a slight crowing sound is heard each time the child draws its breath, the fits of difficult breathing are much more severe; they last longer, and sometimes end in general convulsions. The breathing now does not return at once to its natural frequency, but continues hurried for a few minutes after the occurrence of each fit of difficult breathing, and is sometimes attended with a little wheezing. The slightest cause is now sufficient to bring on an attack; it may be produced by a current of air, by a sudden change of temperature, by slight pressure on the windpipe, by the act of swallowing, or by momentary excitement. The state of sleep seems particularly favourable to its occurrence, and the short fitful dozes are interrupted by the return of impending suffocation, in one paroxysm of which longer and severer than the others the infant may fall back dead.
It scarcely need be said that the great majority of cases have no such sad ending as I have described, but still, whenever this spasm exists, even in a slight degree, there is always the possibility, never to be forgotten, of a sudden catastrophe. Usually, after some tooth has been cut which caused special irritation, or as disorder of the bowels has been set right, the symptoms abate by degrees, and then cease altogether, though liable to be reproduced by the same causes as those to which they were originally due.
The seeking out and removing the exciting causes must be the care of the medical man, but there are some special precautions which come within the mother's own province to observe.
First of all, as sudden excitement, and especially a fit of crying, are likely to bring on the attack, and since there is a possibility that any attack may prove fatal, the greatest care must be taken in the management of the child to avoid all unnecessary occasion of annoyance or of distress.
Although the benefit that accrues from fresh air, or from a change of air, is often very great, yet it is very important that the child should not be exposed to the cold or wind, for I have seen such exposure followed by a severe attack of difficult breathing, or by the occurrence of general convulsions. Another reason for caution in this respect is that the occurrence of catarrh is almost sure to be followed by an aggravation of the spasmodic affection, which, though previously slight, may thereby be rendered serious or even dangerous.
I have nothing to add to what I have already said with reference to the treatment of the attack, when actual convulsions come on. Since, however, in this affection convulsions may occur quite unexpectedly at any moment, it is well always to have a basin of cold water and a bunch of feathers handy, in order to be able at once to dash the water on the child's face, and induce that deep inspiration which saves it from the threatening danger. If this should not suffice, the finger must be put into the mouth, and run over the back of the tongue in the way that I have already explained when speaking of convulsions. Now and then it happens, though but very rarely, that violent general convulsions come on in infancy quite independent of spasmodic croup, not preceded nor attended by any sign of disease of the brain, and which end in the course of some hours or of a few days in death, the child being partly worn out by the violence of the muscular movements, partly by the disturbance of breathing which each fit occasions. Happily, however, in most of these instances the convulsions by degrees lessen both in violence and frequency, and the child recovers.
Epilepsy.—There is one other point of view from which convulsions in infancy and early childhood must be looked on with apprehension, and that is from their being frequently followed in after years by epilepsy. In nearly a fifth of all cases of epilepsy in childhood that have come under my notice the first occurrence of fits dated back to early infancy, and this, even though an interval of years had passed between the last fit in infancy and the first in childhood. It seems, indeed, as though there were in these cases a peculiar abiding sensitiveness of the nervous system, which, dating back from very early life, dependent often on hereditary predisposition, was kindled into activity by any special cause, such as the cutting of the second set of teeth, or the transition from boyhood or girlhood to manhood or womanhood.
In the child, just as in the grown person, epilepsy manifests itself in two different ways; either by momentary unconsciousness, or by violent convulsions, in which latter there is little distinction from the occasional fit which may be observed at any period of infancy.
The attacks of momentary unconsciousness often pass long unnoticed. They occur, perhaps, when the child is at play or at meals; it stops as if dazed, its eye fixed on vacancy; if standing, it does not fall, nor does it drop the toy or the spoon which it was holding from its hand. If speaking, it just breaks off in the midst of the half-uttered sentence. Then, in less time than it takes to tell, it suddenly looks up again, finishes what it was saying, or goes on with its play, or with its meal as though nothing had happened; or it suffices to call the child and the cloud passes from its face, and it is itself again; and the nurse or perhaps even the mother, thinks that it is some odd trick which the child has got. By degrees the attacks become more frequent, and may continue to recur several times a day without any obvious cause, even for months; and this without any change in their character. By degrees, however, under their influence, an alteration takes place slowly in the child's disposition. It loses its cheerfulness and brightness, its face assumes a heavy look, it becomes fretful, and its intelligence grows duller.
Almost invariably after the attacks of this, which has been called the petit mal, have continued for some months, a change begins to take place, which does not fail to excite attention and to cause alarm. If seated, the child's head drops forward for a moment, and strikes against the table; if standing, it becomes for an instant dizzy, and staggers, or even falls, and then there is twitching of one limb, or of the muscles of the face, and then the complete fit of epilepsy, ushered in sometimes, but not always, by a momentary cry, and then the convulsive twitching of one limb, followed in a minute or in less time by convulsions of the whole body as well as of the limbs. The upturned eyes, which do not see, are horribly distorted, the child foams at the mouth, it is insensible, and the insensibility deepens into stupor, or is followed by heavy sleep, for a quarter of an hour, or an hour or more, from which the patient arouses feeling tired and bruised, and often with an aching head, but with no remembrance of what has passed during the seizure so distressing to bystanders.