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April 29, 1950

INFLUENCE OF LOWER EXTREMITY AMPUTATION ON STANCE MECHANICS

Author Affiliations

Richmond, Va.

From the Division of Clinical Research, Baruch Center of Physical Medicine and Rehabilitation, Medical College of Virginia. This study was supported in part by a grant in aid of research from the Committee on Scientific Research, American Medical Association. A preliminary report was read at the Annual Conference of the American Physical Therapy Association in Boston, June 23, 1949 (Mueller, E. E., and Summers, I. M.: Lower Extremity Amputation: Its Effect on the Location of the Center of Gravity of the Body as a Whole, on Postural Alignment and on Stance Stability, Phys. Therapy Rev. 29:454-459 [Oct.] 1949).

JAMA. 1950;142(17):1353-1356. doi:10.1001/jama.1950.02910350023008
Abstract

In 1947 the Committee on Artificial Limbs of the National Research Council1 estimated the incidence of major extremity amputations at 40,000 annually. Thus rehabilitation of the amputee is an important medical problem, and much is being done to improve prosthetic appliances and develop better technics of training the amputee in the functional use of such devices. To date little or no attention has been directed at the biomechanical effect of replacing the anatomic part lost with an artificial limb weighing less than the extremity amputated. This condition holds in the majority of the prosthetic devices now available on the open market. The purpose of this study was to explore this problem as it affects the lower extremity amputee.

CLINICAL MATERIAL AND METHODS  The subjects of the investigation were 42 adults, 24 of whom were lower extremity amputees. Of these, 3 had sustained bilateral lesions, 8 had lost one extremity

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