Author/Authors :
Shirazi SY نويسنده Deptatment of Biomedical Engineering, AmirKabir University of Technology , Safaeepour Z نويسنده Deptatment of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation , Fatouraee N نويسنده Functional Neurosurgery Research Center, Shohada Tajrish Hospital, Shahid Beheshti University of Medical Sciences
Abstract :
Recent studies show significant reduction of postural stability in transtibial amputees (TTAs)
especially when a perturbation is applied. However, no record has been seen on the consequences
of such perturbation on the Stump-Socket Interface Pressure (SSIP). Our objective was to
investigate whether such perturbation impose excessive pressures on the stump. We were also
interested on the type of the response and direction in which TAs may face more difficulties. A
52-year-old TA participated in the study. The trial was performed using a custom bidirectional
perturbing mechanism in the pitch and roll axes of ankle. Center of Pressure and were recorded
by two force platforms and five resistive pressure sensors respectively. Right and anterior
perturbations imposed the maximum SSIP while several CoP measures were considerably greater
for the prosthetic leg just in left perturbations. This supports the necessity of measurement
of SSIP as well as CoP to provide a better understanding about the new situations of TAs in
postural stability.
