A passive exoskeleton can assist split-belt adaptation

Sado, Takashi; Nielsen, James; Glaister, Brian C.; Takahashi, Kota; Malcolm, Philippe; Mukherjee, Mukul

doi:10.1007/s00221-022-06314-w

Cited by 1 publication

(4 citation statements)

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“…In our work with stroke survivors, we found that walking with this device for 5 days changed spatiotemporal patterns, specifically step time, length and width and double support time ( Yao et al, 2021 ). The differences in the results here in comparison to that study could be due to healthy participants in this study who would be generally more adaptive ( Sado et al, 2022 ), had less exposure to the EXO device, and were walking on a treadmill instead of over ground.…”

Section: Discussioncontrasting

confidence: 58%

“…In our previous research, we investigated how healthy young individuals utilize the exoskeleton assistance to learn a novel walking task ( Sado et al, 2022 ). In that study, we used a split-belt adaptation paradigm ( Mukherjee et al, 2015 ) where one leg moved at a faster speed than the other leg because they were on treadmill belts with different speeds.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, there was no objective way to know the tightness of the tendon. In related studies ( Yao et al, 2021 ; Sado et al, 2022 ), the number of ratchet clicks on the disc at the waist was used to have a generic measure of the exotendon tightness. The EXO group only had an exoskeleton on one side.…”

Section: Discussionmentioning

confidence: 99%

“…Exoskeleton: The exoskeleton device, used in this project, was the Kickstart™ Walking System (Cadence Biomedical, Seattle, WA). This passive device ( Figure 2 ), which weighs approximately 7.5 pounds (3.402 kg) ( Sado et al, 2022 ), used an elastic cable (Exotendon™) ( Glaister et al, 2015 ) inspired by a biomechanical model ( van den Bogert, 2003 ). The cable runs parallel to the lateral side of the leg and through pulleys over the three joints (ankle, knee, and hip).…”

Section: Methodsmentioning

confidence: 99%

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Passive Exoskeleton-Assisted Gait Shows a Unique Interlimb Coordination Signature Without Restricting Regular Walking

et al. 2022

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Exoskeleton assistive devices have been developed as a potential approach to solve gait deficits like paretic propulsion and reduced speed. However, it is unclear how these devices affect inter-limb coordination. The duration and the synchrony of gait coordination was assessed during passive exoskeleton-assisted walking in healthy young individuals. It was hypothesized that inter-limb coordination would be reduced in comparison to normal walking without assistance, thus demonstrating gait with exoskeleton to be more explorative and flexible. Eighteen participants were divided into two groups (EXO: n = 9; NO EXO: n = 9) and performed a 5-min walking trial at a preferred walking speed after a familiarization trial. The duration of inter-limb coordination was examined using cross-recurrence quantification analysis and the synchrony was measured using cross sample entropy. There were no significant differences in spatiotemporal measurements between the two groups. However, in comparison to the no exoskeleton group, there was a reduction in the duration of coordination (mean diagonal length: p < 0.01) and the synchrony of coordination (entropy value: p < 0.05) in the exoskeleton group. These results indicate that exoskeletal-assisted gait is characterized by reduced inter-limb coordination possibly for allowing gait patterns to be more explorative and flexible. This is important in rehabilitation of patients who suffer from coordination deficits.

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Section: Discussioncontrasting

confidence: 58%

Section: Discussionmentioning

confidence: 99%