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Design of Spiral-Cable Forearm Exoskeleton to Assist Supination for Hemiparetic Stroke Subjects by Chen, Ava; Winterbottom, Lauren; O'Reilly, Katherine; Park, Sangwoo; Nilsen, Dawn; Stein, Joel; Ciocarlie, Matei is a scholarly article available to read on EtoBox.

What is Design of Spiral-Cable Forearm Exoskeleton to Assist Supination for Hemiparetic Stroke Subjects about?

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.

Author

Chen, Ava; Winterbottom, Lauren; O'Reilly, Katherine; Park, Sangwoo; Nilsen, Dawn; Stein, Joel; Ciocarlie, Matei

Published

2021

Language

EN