Neuromodulation : journal of the International Neuromodulation Society
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Objective. To investigate whether a simple static stiffness model adequately relates the angles and net joint torques (NJT) developed in the ankles (sagittal plane) and in the hips (frontal plane) following perturbations delivered in multiple directions to partially constrained subjects standing quietly. Materials and Methods. ⋯ Conclusions. The relationship between the ankle angles and NJT and hip angles and NJT following perturbed stance can be described as static stiffness. The implications for arm-free paraplegic standing are discussed and a new control scheme is proposed.