How does this robotic exoskeleton help rats walk?
Researchers have developed a specialized robotic exoskeleton that assists a rat's hindlimb movements by coordinating three important joints: the hip, knee, and ankle.
Instead of controlling each joint independently, it uses a mechanical two-degree-of-freedom bar mechanism inspired by the natural biomechanics of rats. This allows the joints to work together in coordinated movement, helping maintain a natural quadrupedal posture.
The system uses cable-based power transmission and motors positioned outside the exoskeleton, making it compact, lightweight, and backdrivable. This means the joints can still move naturally in response to external forces, even when the motors are switched off.
In experiments, the researchers demonstrated that the device could reproduce rat walking patterns and provide coordinated assistance in an anesthetized rat.
Why does this matter? The technology could help scientists study how the nervous system controls movement and recovers from injury, potentially providing useful insights for future human rehabilitation technologies.
One interesting question: Could robotic exoskeletons eventually help humans relearn natural walking after severe injuries? ?
2026-11-06 19:47