Chapter 5

SOME OTHER SIGNS OF NERVOUSNESS

HABIT SPASM

Next to refusal of food and refusal of sleep perhaps the most frequent manifestation of nervous unrest is provided by the group of symptoms which we may call, with a certain latitude of expression, Habit Spasms. By a habit spasm is meant the constant repetition of an action which was originally designed to produce some one definite result, but which has become involuntary, habitual, and separated from its original meaning. The nervous cough forms a good example of a habit spasm. A cough may lose its purpose and persist only as a bad habit, especially in moments of nervousness, as in talking to strangers, in entering a room, or at the moment of saying "How do you do" or "Good-bye." Twitching the mouth, swallowing, elongating the upper lip, biting the lips, wrinkling the forehead so strongly that the whole scalp may be put into movement, and blepharospasm are all common tricks of little children which may become habitual and uncontrolled. In worse cases there may be constant jerking movements of the head, nodding movements, or even bowing salaam-like movements. In mild cases we may note hardly more than a restless movement of mouth or forehead, or constant plucking or writhing of the fingers whenever the child's attention is aroused, when he is spoken to, or when he himself speaks. In nervous children these movements, which should properly be confined to moments of real emotional stress, become habitual, and are displayed apart from the excitement of particular emotions. Whatever their intensity, habitual and involuntary movements of this nature should not be overlooked, and should be regarded as evidence of mental unrest. They do not commonly appear during the first or second years of the child's life. They are more frequent after the age of five, but they may begin to be marked as early as the third year. With refusal of food and refusal of sleep they form the three common neuroses of early childhood.

Two of the three qualities which we have mentioned as characteristic of the child's mind are concerned in the causation of habit spasm. In the early stages the movement is sometimes due to imitation, but the susceptibility of the child to suggestion plays the chief part in determining its persistence. It is an interesting speculation how far tricks of gesture, attitude, or gait are inherited and how far they are acquired by imitation. A child by some characteristic gesture may strikingly call to mind a parent who died in his infancy. A whole family may show a peculiarity of gait which is at once recognisable. It is told of the son of a famous man, who shared with his father the distinctive family gait, that when a boy his ears were once boxed by an old gentleman who chanced to observe him hurrying to overtake his parent, and who resented what he took to be an act of impertinent caricature. In the reproduction by the child of the habitual actions of his parents, heredity is largely concerned, but imitation too plays its part. In habit spasm the force of imitation is clearly seen. A child who has developed a habit spasm of one sort or another will readily serve as a model to other children. The malady will sometimes spread through a school almost with the force of a contagious disorder. A child affected in this way may prove an unwelcome guest. The little visitor with a trick of contorting his mouth and grimacing is apt to leave his small host an expert in faithfully reproducing the action. A cough that is genuine enough in one member of the family may produce a crop of counterfeits in brothers and sisters.

The force of suggestion acting upon the child's mind can clearly be traced. Once his attention is focused upon the particular movement by unwise emphasis on the part of the parents, he loses the power to control its occurrence. This trio of common neuroses--refusal of food, refusal of sleep, and habitual involuntary movement--grows only in an atmosphere of unrest and apprehension. Parents and nurses anxiously watch their development. They are distressed beyond measure to note their steady growth in spite of every attempt which they make to control or forbid them. And of all this unrest and unhappiness the child is acutely conscious. The whole household may become obsessed with the misfortune which has befallen it, and the mother, losing all sense of proportion, feels that she cannot regain her peace of mind until it has been overcome. The child is in need of mental and moral support from those around him, and all that he finds is an openly expressed apprehension and sense of impotence. Even grown-up people, when their nerves are on edge, are apt to be obsessed by uncontrollable impulses or by vague and nameless apprehensions, and surely all have learnt the support they gain from contact and conversation with some one strong and sane, who treats their worries in such a matter-of-fact way that immediately they lose their power and become of no account. The child with habit spasm cannot control these movements. The more he is reproved or entreated, the less able does he find himself to hold them in check. He does not wish them to continue. He has lost control of what he once controlled, and the realisation of this is not pleasant, and may be alarming to him. Yet when unconsciously he looks to his mother for support, he finds in her open dismay that which serves only to increase his uneasiness. She must subdue her own feelings and give the child strength. If she treats the whole thing in a matter-of-fact way, as a temporary disturbance which is of no importance in itself, and only has meaning because it implies that the brain has been over-stimulated, she will no longer exercise a prejudicial effect on the child. If the bad habit is taken as a matter of course, if too much is not made of it, if the child is encouraged to think that nobody cares much about it at all, then recovery will soon take place. It goes without saying that habit spasms and tics of all sorts are made worse by excessive emotional display and by nervous fatigue. On the other hand, if the child becomes absorbed in some interesting occupation, the movements will disappear for the time being.

AIR SWALLOWING, THIGH RUBBING, THUMB SUCKING

At a somewhat earlier age than that in which habit spasms become common, and before bed wetting appears as a formidable difficulty, we meet with another group of habitual actions which yet retain their voluntary character. Among such habitual actions are thumb sucking, thigh rubbing, and air swallowing. If the child is old enough to express himself on the subject, he will explain that these actions are performed because of the satisfaction derived from them, because it is "comfy" and "nice." Even if the child is too small to speak, the expression is that of beatitude and content. These actions are not confined to nervous children, and their occasional practice need not be taken to imply that there is any strong element of nervous overstrain. It is only when the action is repeated with great frequency and persistence, and when signs of irritation ensue if gratification is not obtained, that we are justified in classing it among the symptoms of mental unrest.

The second of these actions, thigh rubbing, is found for the most part in little girls, and inasmuch as it consists of a stimulation of the sexual organs sometimes causes much distress to the parents. It is in reality a habit of small importance unless exercised with very great frequency. It is, of course, not associated in the child's mind with any sexual ideas, and is of precisely the same significance as the other two actions of the same class. Children who can speak will refer to it openly without any sense of shame. As a rule the action is performed in a half-dream state, that condition between sleeping and waking which is found when the child is lying in the morning in her cot or in her perambulator after the midday nap. The child's attention should not be focused on the symptom. She should lie on a hard mattress, and when she wakes in the morning she should either leave her cot at once or she should be roused into complete wakefulness by encouraging her to play with her toys. Little children should be taught to sleep with their hands folded and placed beside the cheek. If the movement occurs on going to sleep, it is best left alone and completely neglected. As a rule each child has his or her own favourite action of this class, and they are seldom combined in the same child. If thigh rubbing is very constant and obstinate and does not yield to the measures suggested, it may even sometimes be a successful manoeuvre to substitute the thumb-sucking habit in the expectation that this less distressing habit may eject the other more objectionable action. As a rule, however, a wise neglect and careful watching during the drowsy condition that follows sleep in a warm bed will succeed in stopping the practice of thigh rubbing before the end of the second or third year. Apparatus designed to restrain movement of the child's legs or blistering the opposed surfaces of the thighs are both of no effect. They have indeed the positive disadvantage that they focus the child's attention on the practice. The habit ceases only when the child has forgotten all about it, and these devices serve only to keep it in remembrance. The same may be said of any system of punishments. Further, we cannot always have the child under observation, and at some time or other opportunity will be found for gratification. Of older children, in whom self-control and a sense of honour can be cultivated, I am not here speaking.

Air swallowing is less common than thigh rubbing, but belongs to the same group of actions and takes place in the same drowsy condition. The child will rapidly gulp down air which distends the stomach, and is then regurgitated with a loud sound. Thumb sucking seldom distresses the mother to the same extent, and the proper attitude of tolerance is adopted towards it. If much is made of it, it is astonishing how persistent the habit may become, surviving all attempts to forbid it, to break it by rewards or punishments, or to render it distasteful by the application of a variety of ill-tasting substances smeared on the offending digit.

PICA AND DIRT EATING

Certain other bad habits will become ingrained if attention is called to them, because of that curious spirit of opposition which characterises little children, and because of their susceptibility to suggestion. Some children will constantly pluck out hairs and eat them, or will devour particles of fluff drawn from the blankets. Others will seize every opportunity to eat unpleasant things, such as earth, sand, mud, or dirt of any sort. All tricks of this sort are best neglected and treated by attracting the child's attention to other things. In adult life they are associated with serious mental disturbance, in early childhood they are of little account, or at most suggest a certain nervousness which may be due to nervous irritation from faults of management which we must strive to correct.

CONSTIPATION

As has been already mentioned, much of the common constipation of the nursery is due to neurosis. The excessive concentration of the nurse's thoughts on this daily question communicates itself to the child. The difficulty is emphasised, and an attempt is made to substitute will power for forces of suggestion which are at once inhibited by concentration of the mind upon the process. Here also, just as in the refusal of food, a further stage of "negativism," that is, of active resistance with crying and struggling, is reached, so that complaint may be made by the mother that defæcation is painful. The same negativism may be shown in micturition, and mothers will give distressing accounts of the suffering of the child during the passing of water.

BREATH-HOLDING AND LARYNGISMUS STRIDULUS

In some children, in the first two years of life, we find a definite and measurable increase in the irritability and conductivity of the peripheral nerves. The strength of current necessary to produce by direct stimulation of the nerve a minimal twitch of the corresponding muscle may be many times less than the normal. Of this heightened irritability of the nervous system, to which the name "spasmophilia" has been given in America and on the Continent, the most striking symptom is a liability alike to tetany or carpo-pedal spasm, to generalised convulsions, and to laryngismus stridulus. In addition, in most cases it is generally possible to demonstrate the presence of Chvostek's sign and of Trousseau's sign. Chvostek's sign consists in a visible twitch of the facial musculature, especially of the orbicularis palpebrarum or of the orbicularis oris, in response to a gentle tap administered over the facial nerve in front of the ear. Trousseau's sign is the production of tetany by applying firm and prolonged pressure to the brachial nerve in the upper arm. The ætiology of spasmophilia is still a matter for dispute, but the evidence which we possess is in favour of the view that we have here to deal with a disturbance of calcium metabolism. The calcium content both of the blood and of the central nervous system has been shown to be much lowered. It is in keeping with this that clinically we note how frequently spasmophilia and rickets occur in the same child. In some families the condition recurs through many generations.

For our present purpose--the examination of some common neuroses of nursery life--it would be out of place to enter into a detailed consideration of this disorder of spasmophilia as a whole. The symptom of laryngismus stridulus--the so-called breath-holding--alone need concern us, and that for a special reason. The spasm of the glottis is produced under the influence of any strong emotion--in anger, for example, or in fear, in excitement or in crying for any reason. To control or prevent it we must direct attention not only to the condition of spasmophilia, but also to the management of the children who are always excitable and emotional. In these children every burst of crying, however produced, whether by a fall, by a fright, by the entrance of a stranger, or by a visit to a doctor, is apt to be ushered in by a long period of apnoea, due to spasm of the glottis and of the diaphragm. The first few expirations are not followed by any inspiration. For several seconds the silence may be complete, while the child steadily becomes more and more cyanosed, or the body may be shaken by incomplete expiratory movements and strangled cries which are suppressed because the chest is already in a position of almost complete expiration. In the worst cases, when the apnoea lasts a very long time, there may be convulsive twitching of the muscles of the face, or the attack may even terminate in general convulsions. Very occasionally the spasm is actually fatal. In all fatal cases which have come to my notice the child at the moment of death had been alone in the room. I have met with no fatal case where the baby could be picked up and assisted. As a rule, therefore, the cause and mode of death must be conjectural, but when an infant is found dead in its cot unexpectedly, it would seem likely that it has waked from sleep with a sudden start, become excited, and, about to cry, has been seized by the fatal spasm. In two instances reported to me a cat had been found in the room with the dead child, and it was suggested that the animal had lain upon the child's face. Both these children, however, were vigorous and capable of powerful movements of resistance. I think it more likely that the cat may have awakened them in fright, and that the emotional excitement, giving rise to the spasm, was the cause of the suffocation. That the apnoea in these extremely rare instances should end fatally produces a difficult position for the doctor. It need hardly be said that the seizures are alarming to the parents. For the sake of great accuracy in the statement of our prognosis are we to add a hundred times to the mother's alarm by stating the possibility of death? In each case we must use our own judgment. I believe that in a child over a year old the risk is almost negligible.

Fortunately in all save the rarest possible instances the apnoea yields and a deep inspiratory movement follows. As the air rushes past the glottis, which is still partially closed, a sound recalling the whoop of pertussis is heard. Often this recurs throughout all the burst of crying which follows, and each inspiration is accompanied by a shrill stridulous sound. With the re-establishment of respiration the cyanosis rapidly fades, to be succeeded in some cases by pallor and perspiration.

It need hardly be said that we should do all in our power to prevent these alarming and distressing attacks. Each seizure predisposes to a repetition. In some children we notice that months and even years after an attack of whooping-cough, a slight bronchial catarrh may be sufficient to bring back the characteristic cough. In laryngismus in the same way we may suppose that the reflex path is made easy and the resistance lowered by constant use. Fortunately the spasms are not usually difficult to control. Calcium bromide, in doses of from two to four grains, according to age, three times daily, is generally successful with or without the addition of chloral hydrate in small doses. At the same time we must endeavour in every way possible to keep the child calm, by paying close attention to nursery management. The child with spasmophilia is as a rule excitable and easily upset, and although calcium bromide is a drug which offers powerful aid it is not able to achieve its effect unless we are able at the same time to guarantee a reasonable immunity from emotional upsets. It is for this reason that I have included some description of laryngismus, although its origin is undoubtedly very different from that of the other disorders of conduct which we have examined.

MIGRAINE AND CYCLIC VOMITING

The ætiology of cyclic or periodic vomiting in childhood is not yet completely understood. We do not know how far it is dependent upon disturbance of the liver, and it is still disputed whether the acidosis which accompanies it is the cause or the result of the profuse vomiting. Into these difficult questions we need not at the moment enter. It is enough in the present connection to recognise that the great majority of children who suffer from cyclic vomiting are sensitive, excitable, and nervous, and that every one is agreed that the nervous system is intimately concerned in its causation.

A close association between cyclic vomiting in children and that form of periodic headache known as migraine has often been observed. It is sometimes found that one or both parents of a child with cyclic vomiting suffer habitually from migraine. In a few instances the one condition has been observed to be gradually replaced by the other, the child with cyclic vomiting becoming in adult life a sufferer from migraine. There is indeed much which is common to the two conditions. The periodic nature of the seizure, often following a time when the general health and vigour appear to have been at their optimum, the extreme prostration, and the comparatively sudden recovery are found in both. In the cyclic vomiting of children, it is true, little complaint is made of headache, the visual aura is absent, and the vomiting is invariably the most prominent symptom.

Cyclic vomiting seldom occurs before the fourth year. It is characterised by sudden profuse and persistent vomiting and by very great prostration. All food, it may be even water, is promptly rejected. The vomited matter is generally stained with bile; occasionally the violence of the vomiting causes hæmatemesis. In many cases the temperature is raised; sometimes it may be as high as 103° F. The duration of an attack varies. In most cases it does not last longer than forty-eight hours. On the other hand, attacks lasting as long as a week are by no means unknown. Within a short time of the onset the urine may be found to contain acetone bodies, the breath may smell distinctly of acetone, and the child may become torpid and drowsy or agitated and restless. At times there may be exaggerated and deepened respiratory movements--the so-called air hunger. In many cases, however, otherwise characteristic, these more severe manifestations are absent or but little apparent. Recovery is usually rapid and complete. The child asks for food, which is retained. A fatal ending is very rare, though not unknown. The frequency of attacks is very various. Sometimes months or even years may elapse between successive seizures; in other cases a fortnightly or monthly rhythm establishes itself.

It is clear that both the frequency and the severity of the attacks are much influenced by the general state of the child's health. Like migraine, cyclic vomiting appears to be a symptom of nervous exhaustion. It affects, for the most part, children who are intellectually alert, impressionable, and forward for their age, and who, when well, throw themselves into work or play with a great expenditure of nervous energy. Often their physical development is unsatisfactory, and we must set ourselves to correct this as the first step in prevention. It is highly important that children suffering in this way should have free opportunities for exercise in the open country, and that all the excretory organs--the skin, kidneys, and bowels--should be acting freely and efficiently. The child should live a life of ordered routine. Sleep should be sound and sufficient in amount. The diet must not exceed the strict physiological needs. Many of these children appear to have a lowered tolerance for fats of all sorts, and it may be necessary to limit strictly the consumption of milk, cream, butter, and so forth. A daily administration of a small dose of alkali by the mouth is credited with preventing attacks. In the present connection, however, we shall not do wrong to emphasise the part played by the nervous system in the production of the attacks. In all cases of cyclic vomiting it should be our endeavour to recognise and remove the elements in the daily life of the child which are proving too exhausting.

UNEXPLAINED PYREXIA

In nervous children we sometimes meet with inexplicable rises of temperature. The pyrexia may have the same periodic character as that just noted in cases of cyclic vomiting. At intervals of three, four, or five weeks there may be a rise of temperature to 103° F., or even higher, which may last for two or three days before subsiding. In other cases the chart shows a slight persistent rise over many weeks or months. That in nervous children the temperature may be very considerably elevated without our being able to detect much that is amiss does not of course make it any the less necessary to be careful to exclude organic disease. Pyelitis, tuberculosis, and latent otitis media occur with nervous children as with others and must not be overlooked. If, however, organic disease can be excluded, and if the pyrexia is the only circumstance which prevents the decision that the child is well and should be treated as well, then the thermometer may be overruled and the pyrexia neglected.