Browsing by Author "Soares, Denise"
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- Lower limb kinematics of transfemoral amputees gait: a principal component analysis approachesPublication . Soares, Denise; Castro, Marcelo; Mendes, Emília; Machado, LeandroThe purpose of this study was to compare the gait waveforms of the ankle, knee and hip in sagital plane kinematic variables between both limbs of transfemoral (TF) amputees and able-bodied subjects using principal component analysis (PCA). Fourteen TF amputees and 20 able-bodied subjects were enrolled in the study. The ankle, knee and hip sagittal plane kinematics were recorded for the able-bodied participants, for the amputed limb and sound limb during self-selected speed gait. The results showed that both TF's lower limbs presented statistical differences in all sudied joints when compared to the able-bodied participants, in different phases in the gait cycle. Also PCA analysis seems to be a powerful tool to descriminate gait parameters considering the whole waveform of the variables involved.
- Transfemoral amputees' gait: principal component analysis of the knee momentsPublication . Soares, Denise; Castro, Marcelo; Mendes, Emília; Machado, LeandroThe purpose of this study was to compare the gait waveforms of the sagittal (KnSAG) and frontal (KnFRT) knee moments between both limbs of TF amputees with able-bodied subjects using PCA. the self-selected speed gait form 14 TF amputees and 20 able-bodied individuals was analyzed. The KnSAG and KnFRT of able-bodied participants, amputated limb and sound limb were calculated using the inverse dynamics approach. PCA was performed in moment waveforms. Considering KnSAG, both TF's lower limbs presented statistical differences compared to the able-bodied participants, while for KnFRT, only the sound limb showed statistical differences compared to the able-bodied subjects. PCA analysis seems to be a powerful tool to analyze gait parameters because it reduces the number of variables necessary to represent the whole gait waveform and it showed to be sensible to identify alterations in knee moment bahaviour.