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A number of robotic ankle-foot orthoses with practical application for stroke patients have been developed in recent years. However, targets are mainly patients in the chronic phase. In this paper, we present development of a high-dorsiflexion assistive system aiming to support passive dorsiflexion movement in the swing phase for subacute patients in the early phase of gait rehabilitation. By applying a McKibben-type artificial muscle, output of high dorsiflexion torque with a low-weighted prototype was realized. This is expected to minimize loading burden on subacute stroke patients. An experiment on six healthy participants was conducted, and different extents of compensatory movements were applied when their dorsiflexion movements were restricted. The results of processed surface electromyography data significantly decreased when dorsiflexion movement was assisted with our system. Meanwhile, the results of spatial parameters also showed significant improvement of compensatory movement inclination with sufficient assistance. These indicate the potential of realizing assistance of passive ankle movements for patients with very low dorsiflexion abilities, which shows the potential for our future planning of practical pilot studies.
Keywords
Stroke, Hemiplegia, Rehabilitation, Dorsiflexion, Ankle-foot orthosis
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research Article
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 15 Sep, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Nanoscience
License:
This work is licensed under a CC BY 4.0 License. Read Full License
A number of robotic ankle-foot orthoses with practical application for stroke patients have been developed in recent years. However, targets are mainly patients in the chronic phase. In this paper, we present development of a high-dorsiflexion assistive system aiming to support passive dorsiflexion movement in the swing phase for subacute patients in the early phase of gait rehabilitation. By applying a McKibben-type artificial muscle, output of high dorsiflexion torque with a low-weighted prototype was realized. This is expected to minimize loading burden on subacute stroke patients. An experiment on six healthy participants was conducted, and different extents of compensatory movements were applied when their dorsiflexion movements were restricted. The results of processed surface electromyography data significantly decreased when dorsiflexion movement was assisted with our system. Meanwhile, the results of spatial parameters also showed significant improvement of compensatory movement inclination with sufficient assistance. These indicate the potential of realizing assistance of passive ankle movements for patients with very low dorsiflexion abilities, which shows the potential for our future planning of practical pilot studies.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
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