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A neurorobotic platform for locomotor prosthetic development in rats and mice

Publication date:

Authors:

  • Published in: Journal of Neural Engineering (ISSN: 1741-2552), vol. 13, num. 2, p. 026007
  • Bristol: Institute of Physics, 2016

Objectives. We aimed to develop a robotic interface capable of providing finely-tuned, multidirectional trunk assistance adjusted in real-time during unconstrained locomotion in rats and mice. Approach. We interfaced a large-scale robotic structure actuated in four degrees of freedom to exchangeable attachment modules exhibiting selective compliance along distinct directions. This combination allowed high-precision force and torque control in multiple directions over a large workspace. We next designed a neurorobotic platform wherein real-time kinematics and physiological signals directly adjust robotic actuation and prosthetic actions. We tested the performance of this platform in both rats and mice with spinal cord injury. Main Results. Kinematic analyses showed that the robotic interface did not impede locomotor movements of lightweight mice that walked freely along paths with changing directions and height profiles. Personalized trunk assistance instantly enabled coordinated locomotion in mice and rats with severe hindlimb motor deficits. Closed-loop control of robotic actuation based on ongoing movement features enabled real-time control of electromyographic activity in anti-gravity muscles during locomotion. Significance. This neurorobotic platform will support the study of the mechanisms underlying the therapeutic effects of locomotor prosthetics and rehabilitation using high-resolution genetic tools in rodent models.

    Reference

    • Detailed record: https://infoscience.epfl.ch/record/216980?ln=en
    • EPFL-ARTICLE-216980
    • doi:10.1088/1741-2560/13/2/026007
    • View record in Web of Science
    Reference
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