Joint impedance plays an important role in postural control and movement. However, current experimental knowledge on lower limb impedance during gait is limited to the ankle joint. We designed the LOwer limb PERturbator (LOPER) aimed to assess knee and hip joint impedance during gait. The LOPER applies force perturbations with a 39 Hz bandwidth, tested on a free-hanging leg. In minimal impedance mode, peak interaction forces during walking are low (< 5 N). Also, this mode has a negligible effect on the gait pattern, as it is smaller than the within-subject variability during normal walking. In short, the LOPER is a transparent device able to elicit a clear response at both hip and knee joints to investigate lower limb dynamics. A second motor added to the LOPER could improve isolation of the perturbation contribution to knee and hip dynamics. People with neurological disorders can benefit from knowledge of joint impedance during gait through improved biomimetic devices and clinical decision making.
|Title of host publication||Converging Clinical and Engineering Research on Neurorehabilitation IV|
|Subtitle of host publication||Proceedings of the 5th International Conference on Neurorehabilitation (ICNR2020), October 13–16, 2020|
|Editors||Diego Torricelli, Metin Akay, Jose L. Pons|
|Publication status||Published - 2022|
|Event||ICNR 2020: International Conference on NeuroRehabilitation (Virtual) - |
Duration: 13 Oct 2020 → 16 Oct 2020
|Name||Biosystems and Biorobotics|
|Conference||ICNR 2020: International Conference on NeuroRehabilitation (Virtual)|
|Period||13/10/20 → 16/10/20|
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