Myoelectric controlled trunk orthosis to support rollover of patients with cancer bone metastasis

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Based on a pneumatic artificial rubber muscle(PARM) to restrict trunk-twisting range of motion(ROM), a robotic trunk orthosis was developed to support the rollover movement of cancer bone metastasis patients. The specifications of the robotic orthosis were determined so that it could perform in the same way as a traditional hard orthosis. Systems of the robotic orthosis were evaluated for detecting the intention of rollover using the electromyogram(EMG) signal, recognizing rollover by a micro macro neural network, and restricting trunk ROM using PARM. Through experimentation, the effectiveness of the robotic orthosis in rollover movements was confirmed by comparing its capability to restrict ROM with that of the customized hard orthosis.