Over-attention to sensations, often scarcely abnormal, is indeed the real source of many of the symptoms that can so readily be exaggerated into pathological portents when attention is directed to them. Every portion of our body is connected with the central nervous system. Every square inch of surface touched either by clothing or the movement of the air producers a sensation at every moment of our waking life. Ordinarily we pay no attention at all to these sensations. We can recognize their presence by turning our attention for the moment to any portion of the body and recognizing at once that there are sensations coming from it, though the moment before we did not notice them. If we think of the point of our big toe on the right foot we find, though we were totally unaware of it a moment before, that a certain pressure is being exerted in it. If we continue to think of it queer feelings develop in it. We may get a sense of numbness that proceeds up along the tendons that lead to it. We can follow them up to the insertion of the muscles in the shin. If we dwell on the subject we have curious prickly sensations and numb feelings, all of which were there and were neglected a minute before but now are acutely felt.
This same thing is true of all the manifold sensations that come streaming into the brain. We learn almost to enjoy them though we are paying no attention to them. To be without them would mean very often a fright lest there should be something the matter. Usually we think of the outside of our body as the main source of sensation. It must not be forgotten, however, that our viscera have also certain sensitive nerves and while these are not as closely distributed as those on the surface they are there and their presence is often a source of pleasure or at least of satisfaction, but may be the source [{561}] of poignant discomfort. We are constantly disregarding ordinary messages from these, too. Something may easily call our attention to these sensations, however, and then we may translate them into pathological terms though they are really only physiological. Ordinarily man may put a couple of pounds of food and drink into his stomach and not feel it at all. If anything particularly calls attention to our stomachs, however, and we dwell on it, then this weighty feeling may seem to indicate serious indigestion because of the discomfort that is produced. This is what nervously weak persons, the so-called neurasthenics, are constantly doing. It is this habit that by suggestion and training they must be taught to break.
There is a tendency to the substitution of one neurotic symptom for another whenever by psychotherapy and mental discipline one condition is overcome. Often the substitution is of something just as bad or even worse. I have known cases where people when properly persuaded gave over paying too much attention to their stomachs and then proceeded to pay too much attention to their sleep with the result that insomnia developed. On the other hand, I have known patients to get over insomnia and then develop a series of complaints of queer feelings in their head which they usually spoke of as headache, though when asked to describe them carefully they confessed that they were at most a sense of pressure or of unusual feeling in some part of the head.
These curious substitutions take place particularly if for any reason special attention is called to another part of the body, either by accident or by some therapeutic manipulation or remedial measure. I have known a patient who complained of headache and was advised to take up exercise in the open air, do much stooping and lifting while cleaning snow from the sidewalk, develop a tired condition in the lumbar muscles and straightway this was thought to be rheumatic. Liniment was employed and the counter-irritation which developed attracted the patient's attention to that portion of the body for a week. The headache was no longer complained of, but lumbago was considered to have developed. I have known a person who suffered from headache develop what seemed to be a retention of urine for which unfortunately the doctor thought it necessary to use a catheter and after this there was no complaint of the headache, but the patient became almost unable to hold any amount of urine in her bladder and could not go out for social or other duties because of the fear of imperative urination.
CHAPTER II
CHOREA
This twitching affection, so familiar that it need not be described particularly, is sometimes classed as a pure neurosis, sometimes as a nervous disease with perhaps some organic basis and sometimes is placed among the ailments related to rheumatism and attributed to some pathological condition of the circulation.
Etiology.—Two elements must be considered in the problem of the etiology [{562}] of the disease—the predisposition and the direct occasion. The affection occurs particularly in nervous children who are made to occupy their intellects too much while their muscular systems are kept quiet for long hours. Often a preceding running down in weight is noticed, though sometimes the child only fails to increase in weight as it should in proportion to its growth. It occurs quite frequently among chlorotic girls just before or about the time of puberty. Anemia generally seems to predispose to it, but the affection may occur among children who seem to be in excellent physical health, though usually a distinct nervous heredity is found.
Immediate Causation.—Fright is one of the most frequent immediate causes or occasions of the development of chorea. Mental worry of any kind may have the same effect. Scolding has produced it; a sudden grief has seemed to be the occasion; a slight injury, and still more, a severe injury, or a surgical operation, even a slight one, may be the forerunner of it.
Pathology.—No definite lesions have been found to which the disease can be attributed, though a careful search has been made for them. Endocarditis is an extremely common accompaniment. It is probably present in three-fourths of the cases that have come to autopsy. Osler found it in sixty-two out of seventy-three cases in the literature. The association of the affection with rheumatism is insisted on by the French and English particularly, and certainly in a considerable number of cases there is a history of preceding or coincident rheumatism, that is, an acute rheumatic arthritis. Often these attacks are concealed under such names as "growing pains" or "colds in the joints" but it is not hard to elicit a history of a red and swollen joint with some fever. In children mild cases may occur of genuine acute rheumatism with the involvement of but a single joint and that not severely. These mild forms are often found in the history of cases of chorea.
It seems likely that the heart affection is often responsible for the symptoms and it is probably through the endocarditis that whatever connection there is between chorea and rheumatism exists.