When I was using the Saebo-flex, the thumb was the problem with only one cable.
Thumb Stabilization and Assistance in a Robotic Hand Orthosis for Post-Stroke Hemiparesis
Publisher: IEEE
All Authors
Abstract:
We
propose a dual-cable method of stabilizing the thumb in the context of a
hand orthosis designed for individuals with upper extremity hemiparesis
after stroke. This cable network adds opposition/reposition
capabilities to the thumb, and increases the likelihood of forming a
hand pose that can successfully manipulate objects. In addition to a passive-thumb version (where both cables are of fixed length), our approach also allows for a single-actuator active-thumb version
(where the extension cable is actuated while the abductor remains
passive), which allows a range of motion intended to facilitate creating
and maintaining grasps. We performed experiments with five chronic
stroke survivors consisting of unimanual resistive-pull tasks and
bimanual twisting tasks with simulated real-world objects; these
explored the effects of thumb assistance on grasp stability and
functional range of motion. Our results show that both active- and
passive-thumb versions achieved similar performance in terms of
improving grasp force generation over a no-device baseline, but active
thumb stabilization enabled users to maintain grasps for longer
durations.
Published in: IEEE Robotics and Automation Letters ( Early Access )
Publisher: IEEE
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