We present the development of a cable-based passive forearm exoskeleton that is designed to assist supination for hemiparetic stroke survivors. Our device uniquely provides torque sufficient for counteracting spasticity within a below-elbow apparatus. The mechanism consists of a spiral single-tendon routing embedded in a rigid forearm brace and terminated at the hand and upper-forearm. A spool with an internal releasable-ratchet mechanism allows the user to manually retract the tendon and rotate the hand to counteract involuntary pronation synergies due to stroke. We characterize the mechanism with benchtop testing and five healthy subjects, and perform a preliminary assessment of the exoskeleton with a single chronic stroke subject having minimal supination ability. The mechanism can be integrated into an existing active hand-opening orthosis to enable supination support during grasping tasks, and also allows for a future actuated supination strategy.

翻译：我们展示了一种基于电缆的被动前臂前臂外螺旋的开发,目的是帮助超偏心中风幸存者的悬浮。 我们的装置独特的装置提供了足以在下螺旋装置内抗聚变的电荷。 机制包括嵌入硬前臂的螺旋型的单十度航线,并在手和上前臂上端终止。 一个带有内部可切除机制的池子,使用户能够手动收回弯曲,并旋转手掌,以抵消因中风造成的非自愿前臂合力。 我们用台式测试和5个健康对象来描述这一机制,并对外骨骼进行初步评估,对单慢性中风的机体进行最弱的增生能力。 可将这一机制整合到现有的主动手开关或前臂性疾病中,以便在抓取任务期间提供增压支持,并允许今后采用主动的增压战略。