A treatise on orthopedic surgery . , except in the ex-treme cases in which the tibia may be turned directly forwardon the femur, even to a right angle or less. In the ordinarycases the range of extension is merely exaggerated, while flexionis limited or checked, principally by adaptive shortening of thequadriceps extensor muscle (Fig. 306). In some cases theremay be changes in the direction of the articulating surfaces inadaptation to the deformity of the femur and tibia.^ The appearance in well-marked genu recurvatum is verypeculiar; it is as if the patients leg were reversed, for thepoplitea
A treatise on orthopedic surgery . , except in the ex-treme cases in which the tibia may be turned directly forwardon the femur, even to a right angle or less. In the ordinarycases the range of extension is merely exaggerated, while flexionis limited or checked, principally by adaptive shortening of thequadriceps extensor muscle (Fig. 306). In some cases theremay be changes in the direction of the articulating surfaces inadaptation to the deformity of the femur and tibia.^ The appearance in well-marked genu recurvatum is verypeculiar; it is as if the patients leg were reversed, for thepopliteal depression has become a prominence and the range ofoverextension seems to represent normal flexion. In such casesthe leg may be brought to the straight line, but greater flexionis resisted by the retracted tissues, and when the pressure of thehand is removed the leg is drawn back to the deformed positionby the contraction of the quadriceps extensor , Eevue dOrthopedie, May, 1903. 456 OETHOPEDIC Congenital genu Iecurvatum. (HofEa.) Accompanying Deformities and Malformations.—Genu re- curvatum is not infrequently accompanied by varus or valgusdeformity at the knee, more often by the latter, and by laxityof the ligaments. In many instances the patella is absent or isrudimentary, and not infrequently the deformity is accom-panied by malformations or defective development of other•parts. Seventy-eight cases were collected by Potel.^ In 37 instancesthe deformity v^as limited to one side; in the others both limbswere affected. In 50 cases the condition of the patella wasnoted; in26 of these it was absent or rudimentary. Twentyof the cases were accompanied by talipes. Etiology.—The deformity in cases of simple recurvatum maybe explained by an abnormal and fixed position in utero, and incases seen soon after birth the mechanism is clearly shown bythe habitual attitude. The thighs are sharply flexed on thebody; the dorsal surfaces of the hypere
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Keywords: ., bookauthorwhitmanr, bookcentury1900, bookdecade1910, bookyear1910
