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Hybrid assistive limb for single joint (HAL®-SJ). The HAL-SJ for the upper extremity is fitted with an upper arm supporter, forearm supporter, and small power unit placed laterally to the elbow. The power unit consists of angular sensor and an actuator. The controller is handheld and enables visual identification of bioelectric signals of the wearer. The whole system including electrodes for flexion, extension, and reference, and a control unit and battery.
