[Footnote 35: How much deterioration of the tissues of the foot may be brought about by improper footwear and, above all, by sedentary life and the substitution of the trolley car for the exercise of walking, is well illustrated by the functions that are lost. The child can use its adductor and abductor muscles for the toes quite as well as for the fingers. Those who go barefooted retain those muscular powers. Some time we will be able to influence young folks' minds enough to keep them from sacrificing all the more delicate muscular powers of their feet to the fashion of small or curiously shaped shoes. Armless men learn to use their feet almost as hands, they write, pick up small articles, oven play musical instruments.
Some people have special muscular faculties, as, for instance, the power to displace certain tendons and bring them back with a snap which makes a distinct sound. The Fox sisters, to whom we owe the origin of modern spiritism, confessed that this was the way they produced their spirit rapping. Some mediums can, it is said, dislocate the tendon of the flexor longus hallucis onto the edge of its grove and then bring it back with a snap. Others can produce partial toe dislocations which by muscular power are suddenly reduced with a dull noise like the sound of a gloved hand rapping beneath the table.]

Prophylaxis.—The most important means of prophylaxis in these cases is to have patients who must assume the standing position for some hours each day, exercise their legs rather vigorously. If teachers, lecturers, and the like, have to stand for a long time, it is important that on the way to and from their occupations they should not have to stand up in cars nor assume cramped and uncomfortable positions. It would be better for them to walk rapidly for several miles rather than ride in a standing or a constrained position. If they are convinced of the necessity for exercise, there is much less likelihood of the development of the severer discomfort that is sometimes very discouraging. It is particularly difficult to make women understand this; yet, once they have found how much relief is afforded by vigorous exercise, they are likely to overdo it and thus run the risk of incurring ills quite as serious as those consequent upon not taking enough. In nervous people the nagging discomfort of a yielding arch will sometimes (just as eye strain does) produce reflex headaches, constipation, lack of appetite, and apparently predispose to the frequent recurrence of migrainous headaches. I have, in not a few cases, seen these conditions relieved by rational treatment of the foot condition.

Circulatory Disturbances Due to Flatfoot.—An interesting direct consequence of flatfoot is the disturbance of the venous circulation, which is likely to bring about some swelling of the feet and nearly always considerable coldness and numbness, particularly in the winter and, above all, on damp days during cold weather. The swelling of the feet makes the patient think—sometimes at the suggestion of his physician—of kidney trouble or heart trouble, and sometimes it is hard to persuade him that there is nothing serious the matter with these important organs. The disturbance of the circulation further leads to numbness, to some anesthesia, and to paresthesia. Corns and especially callouses grow more readily between the toes, and patients who are prone to read about such ailments may conclude that they are suffering from hypesthesia [{420}] and hyperesthesia due to some serious progressive organic nervous disease. I once had a woman patient discourse learnedly to me about these things who was sure that she had the beginning of some incurable spinal disease. Locomotor ataxia was the least she might expect from her description of her feelings. What I found was flatfoot. Raising her arch cured her.

The cold feet and the numbness, to call them by simple Saxon names which will not disturb patients, may sometimes keep them awake. In the chapter on [Insomnia] we suggest that the best thing for this is to secure a return of the circulation either by exercises, or by wearing a flatfoot brace during the day, or by putting the feet in water as hot as can be comfortably borne and keeping them there for a quarter of an hour. Of these means exercise is the best. Raising up on the toes after the shoes are off and coming down on the outside of the foot strengthens the muscles, pulls the bones of the arch firmly together and encourages the circulation. For beginning flatfoot this is a curative measure and it is the natural mode of treatment for the coldness and numbness of the feet. Rubbing, also, is good for the feet in order to restore the circulation, but patients are inclined to rub downwards while they should rub upwards in order to help the hampered venous circulation. The thin-walled veins are more likely to be compressed by any disturbance of tissues than are the firm-walled arteries, and it is to help the veins that our remedial measures must be directed.

Secondary Consequences.—The secondary consequences of flatfoot are interesting. It is surprising how many people who frequently suffer from sprains of the ankle have some yielding of the arch as a predisposing factor to that condition. Two classes seem to suffer frequently from sprained ankle—those with yielding arches and those with high insteps. Apparently there is weakness in the excess in both directions. Very flatfooted people apparently do not suffer so frequently from sprained ankles as those in whom there is only an incipient yielding of the arch. They seem to have learned to walk more circumspectly. Perhaps, too, their well-known tendency to toe outward lessens their liability to turning on their ankle. The effects of sprains of the ankle in people with weak foot last, as a rule, longer and leave more weakness after them than they do in ordinary cases. This, of course, might be expected, but it is surprising how often the significance of beginning flatfoot fails to be noticed even by the physician. I have seen rather frequently cases of so-called chronic rheumatism in which there is a series of stories of sprained ankle because of the assumed weakness of the ankle from supposed rheumatism, when the whole case can be summed up in a yielding arch.

Exercises.—If the arch has not yielded much, it is often unnecessary to prescribe flatfoot braces or arch supports of any kind, unless perhaps at first. After the first soreness has passed off, exercises may be employed to strengthen the muscles. As we have said, the patient should rise on his toes and then come down slowly on the outside of his feet. He may be instructed to sit with his feet—not his legs—crossed, the feet resting on their outer edges. He may be shown how even various slight movements of his toes, almost without moving his shoes at all, will strengthen the muscles that pass around the arch, which, thus strengthened, will hold the bones of the arch firmly together and prevent further yielding. There is, at the present day, a tendency to recommend too freely the wearing of flatfoot braces or arches. After all, these are [{421}] only crutches and should not be worn unless absolutely necessary. If the arch can be strengthened—as it can be in many cases—so as to bear the body weight without discomfort, then this is much the better treatment. If the arch is restored the feet are in a more natural condition, while artificial support leaves the muscles without that exercise which will preserve their functions. Flatfoot braces may be necessary, but only if absolutely necessary should they be advised, and palliative measures, such as exercise, manipulations, and rubbings, should be given a fair trial after the unfavorable suggestions as to his foot condition have been removed from the patient's mind.

Significance of Foot Troubles.—We have devoted much space to foot troubles—more, perhaps, than will seem justified to the minds of many physicians. We have done so, however, because of the firm conviction that the feet are the source of more discouragement and depression of mind than any other part of the body. Life very often takes on another aspect when foot troubles are relieved. In the old, progressive deformities of the feet consequent upon mechanical disturbance are probably the source of more discomfort, and by their interference with exercise and outing, the cause of more ill-feeling and even disturbance of health than any other single factor. Even life may be shortened by the confinement or limitation of movement consequent upon bad feet. Above all, the idea that any constitutional trouble, or hereditary disease, is at the bottom of their affliction must be removed, and then these patients are encouraged to live their lives more fully and with more happiness for themselves and others. Hence this long chapter.

CHAPTER IX
ARTHRITIS DEFORMANS

Arthritis deformans has unfortunately been called by several names besides the descriptive term which, in the present state of our knowledge, is the most suitable for it. We do not know its cause. We do not well understand even the predisposing factors in its causation. Hence, the term arthritis deformans, which declares simply that it is an inflammatory condition of the joints producing deformities, exactly fits it. It has often been spoken of by such names as "rheumatic arthritis," or "rheumatoid arthritis," and, above all, by the unfortunate term "rheumatic gout." Many of the worst suggestions that attach to the word rheumatism are founded on these ill-chosen designations. Arthritis deformans was supposed to be connected with rheumatism or with gout, or perhaps to be due to a combination of the two. In a majority of the cases there is no history of either true gout or rheumatism to be obtained from the patient, and where a rheumatic or gouty history does occur, it is either quite indefinite or it is clear that arthritis deformans developed in a gouty or rheumatic subject, that is, following genuine gout or rheumatism, just as it might develop in any other individual without any causal connection between it and the other affections.

Supposed under the old theory to be a constitutional, probably a blood disease, patients who saw the ugly, crippling deformities produced by it and [{422}] then heard the word rheumatism used in connection with it were prone to think of this as the terminal stage of all the severe rheumatic conditions. As a matter of fact no evidence that we have shows that the disease has any connection with chemical modifications of nutrition or metabolism; nor, above all, has the so-called uric acid diathesis or any other superacidity of the blood any etiological connection with it. It has always seemed to me to be clearly a nervous arthropathy, as the lesions are almost without exception more or less symmetrically distributed. The joints that suffer are commonly the smaller ones in corresponding positions on opposite sides of the body, and they run a definite atrophic course sometimes with the preceding phase of hypertrophy that is so characteristic of the trophic lesions of an affection produced by a disease or defect of the nervous system. This symmetrical distribution constitutes the best possible evidence that arthritis deformans is not a nutritional disease and, above all, is not due to chemical changes in the blood.