Proceedings on Automation in Medical Engineering
Vol. 3 No. 1 (2026): Proc AUTOMED
https://doi.org/10.18416/AUTOMED.2026.2491

18th Interdisciplinary AUTOMED Symposium in Collaboration with the TC Medical Robotics, 2491

Compensatory Posture Modeling in Lower Limb Amputees

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Thomas Krauskopf (1)Laboratory for Biomedical Microtechnology, Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany; 2)BrainLinks-BrainTools, University of Freiburg, Freiburg, Germany), Clemence Ott (Department of Neurology and Neuroscience, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany), Georg Herget (Department of Orthopaedics and Trauma Surgery, Faculty of Medicine, Medical Center, University of Freiburg, Germany), Johanna Kubosch (Department of Orthopaedics and Trauma Surgery, Faculty of Medicine, Medical Center, University of Freiburg, Germany), Christoph Maurer (1) Department of Neurology and Neuroscience, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany; 2) BrainLinks-BrainTools, University of Freiburg, Freiburg, Germany), Thomas Stieglitz (1) Laboratory for Biomedical Microtechnology, Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany; 2) BrainLinks-BrainTools, University of Freiburg, Freiburg, Germany; 3) Bernstein Center Freiburg, University of Freiburg, Freiburg, Germany), Cristian Pasluosta (1) Laboratory for Biomedical Microtechnology, Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany; 2)BrainLinks-BrainTools, University of Freiburg, Freiburg, Germany)

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Abstract

The human body maintains balance using somatosensory, visual, and vestibular inputs. Individuals with lower limb amputations experience balance deficits due to reduced feedback, leading to a reorganization of their balance control system. We applied controlled perturbations to transtibial (TTA) and transfemoral amputees (TFA), and able-bodied controls, while an inverted pendulum model was used to analyze balance control properties. TFA participants exhibited frequency-specific phase deficits without vision and markedly reduced proprioceptive weights despite preserved gain magnitudes, even during eyes-open conditions. These results suggest distinct postural control adaptations in amputees compared to controls.

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