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JB Mignardot, CG Le Goff, R van den Brand, M Capogrosso, N Fumeaux, H Vallery, S Anil, J Lanini, I Fodor, G Eberle, A Ijspeert, B Schurch, A Curt, S Carda, J Bloch, J von Zitzewitz and G Courtine
Gait recovery after neurological disorders requires remastering the interplay between body mechanics and gravitational forces. Despite the importance of gravity-dependent gait interactions and active participation for promoting this learning, these essential components of gait rehabilitation have received comparatively little attention. To address these issues, we developed an adaptive algorithm that personalizes multidirectional forces applied to the trunk based on patient-specific motor deficits. Implementation of this algorithm in a robotic interface reestablished gait dynamics during highly participative locomotion within a large and safe environment. This multidirectional gravity-assist enabled natural walking in nonambulatory individuals with spinal cord injury or stroke and enhanced skilled locomotor control in the less-impaired subjects. A 1-hour training session with multidirectional gravity-assist improved locomotor performance tested without robotic assistance immediately after training, whereas walking the same distance on a treadmill did not ameliorate gait. These results highlight the importance of precise trunk support to deliver gait rehabilitation protocols and establish a practical framework to apply these concepts in clinical routine.
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Gravitation, Spinal cord injury, Spinal cord, Animal locomotion, Gait analysis, Running, Locomotion, Walking
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