caused by a shortening of the gastrocnemial and soleal muscles, aided, in some cases, by the flexors of the toes. In this species of the deformity the individual walks upon the ball of the foot, the toes, or upon the metatarso-phalangeal articulations, without the heel or any other part of the sole touching the ground. The distance at which the heel is raised varies in different cases, from six lines to four or five inches, according to the extent of the contraction upon which the distortion depends. Considerable diversity is observed in regard to the manner in which the person treads on the ground; most commonly the ball of the little toe bears the brunt of the pressure, but in some instances the weight is thrown upon the great toe, or it is diffused over the whole of the fore part of the plantar surface. In the worst gradations, the heel is so much elevated that the foot forms nearly a straight line with the leg, the toes are much deformed, the instep is unnaturally convex, the plantar aponeurosis is greatly contracted, and the skin above the heel is thrown into dense wrinkles.
In the fourth variety—the calcaneal, recently described by Mons. Scoutetten—the limb rests upon the heel, the toes being drawn upwards,
towards the anterior surface of the leg, with which they sometimes form an acute angle. The immediate cause of the deformity seems to be a contraction of the anterior tibial muscle and of the extensor of the great toe, assisted occasionally by that of the common extensor of the foot. The tendons of these muscles form an evident protuberance under the skin, where they present the appearance of tense, rigid chords, which powerfully resist the extension of the limb. The inner margin of the foot, as seen in the cut, is sensibly elevated above the outer, and there is always considerable atrophy of the leg. The distortion, which is almost always congenital, is exceedingly rare. Occasionally the foot inclines slightly outwards, owing to the inordinate contraction of the common extensor muscle.
The changes which the bones, ligaments, and muscles undergo, vary, not only in the different species of club-foot, but in the different stages of the same case. The greatest alteration appears to exist on the part of the tarsal bones, which, although they are rarely completely dislocated, are generally somewhat separated from each other, twisted round their axis, variously distorted, atrophied, or marked by irregular spicula or exostoses. The calcaneum, cuboid, scaphoid, and astragalus, always suffer more than the other bones; which, however, as well as those of the metatarsus and of the toes, usually participate, more or less, in the deformity. The ligaments, in recent cases of club-foot, do not present any material changes, but in those of long standing, or in the higher grades of the affection, they are invariably stretched in the direction of extension, and relaxed in that of flexion. In some instances the original structures are partially replaced by bands of new formation, of a dense fibrous character—the volume and resistance of which vary according to the duration of the disease and the pressure of the parts which they serve to connect together. The muscles also are not much altered in the first instance, except that they deviate from their natural direction, and that, like the ligaments, they are elongated on the one hand and shortened on the other. In ancient cases the whole limb is always considerably wasted, and many of the muscles are remarkably thin and pale, or even transformed into soft, fatty bundles. The cellular substance is condensed and diminished in quantity; the adeps is absorbed; and even the vessels and nerves supplying the affected part are apparently reduced in volume. The skin of the foot, which receives the principal brunt of the pressure in standing and walking, is generally very much thickened and indurated, and large synovial bursæ are often formed beneath it, which are apt to inflame, and thus add to the suffering of the patient. Such is an outline of the more important changes experienced by the different textures in cases of club-foot: to enter more minutely into the subject would be foreign to the design of this article, the object of which is merely to present a general idea of the nature, causes, and treatment of this singular distortion.
The treatment of this affection should be delayed as little as possible. The sooner, indeed, it is attended to, the more probable will be the chances of effectually removing it. This is equally true, both of the congenital and of the accidental form of the disease. The bones in early life and in recent malformations are much more easily restored to their normal position than in youth and manhood, or in cases of long standing; and the muscles also regain much sooner, as well as more completely, their original power. In the worst grades of the disease it is often exceedingly difficult, if the treatment be delayed until after the age of puberty, to accomplish a cure without great carving of the tendons, and the constant employment for months of various kinds of apparatus.
It is still a disputed point, whether, in the treatment of this affection, particularly in infants and young subjects, it is necessary, or even justifiable, to divide, as a preliminary step, the tendons of the muscles which are instrumental in keeping up the distortion. Without endeavouring to settle this question, for which the time has not perhaps yet arrived, I must express my conviction that the present rage for tenotomy is calculated to do a vast deal of harm, not only in individual cases, many of which do not require it, but, what is worse and more deeply to be lamented, in bringing discredit upon an operation, which, if judiciously performed, cannot fail to be of the greatest benefit. In most of the cases occurring in children under two or three years of age, division of the tendons is altogether unnecessary; indeed, one of our most distinguished orthopedic surgeons, Dr. Chase of Philadelphia, seems to trust almost entirely to the employment of apparatus, and to resort to tenotomy only in the worst grades of the disease. Whether this practice will ultimately be adopted by the profession generally, or the division of the tendons be restricted to particular cases, it would be premature to predict; but my opinion is, that much more cutting is now done than is necessary, or than would be done if the treatment of the disease were better understood than it appears to be.
Different kinds of apparatus are in vogue for the cure of this deformity, and it is therefore impossible to determine which is the best, or which should be employed to the exclusion of the others. Every practitioner seems to have his own notions on the subject, and to adopt such measures as whim, fancy, or caprice may dictate. Whatever apparatus be resorted to, the great caution to be observed, on the part of the surgeon, is, that the extension be made in a slow and gradual manner, that the skin be protected from friction and uneven pressure, and that the dressings be steadily retained during the night, as well as during the day, until several weeks after all deformity has disappeared. The object of these directions is self-evident, and too important to be neglected in our curative procedures. The time required for restoring the limb to its normal position must necessarily vary in different cases, and depend upon so many circumstances as to render it impossible to lay down any specific rule. From six weeks to four months, however, may be considered as a fair average, though occasionally a much longer period will elapse. The division of the tendons of the contracted muscles generally expedites the cure by several weeks.