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Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis

Spinal cord injury (SCI) can cause paralysis of trunk and hip musculature that negatively impacts seated balance and ability to lean away from an upright posture and interact fully with the environment. Constant levels of electrical stimulation of peripheral nerves can activate typically paralyzed m...

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Autores principales: Friederich, Aidan R. W., Lombardo, Lisa M., Foglyano, Kevin M., Audu, Musa L., Triolo, Ronald J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10568131/
https://www.ncbi.nlm.nih.gov/pubmed/37841066
http://dx.doi.org/10.3389/fresc.2023.1222174
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author Friederich, Aidan R. W.
Lombardo, Lisa M.
Foglyano, Kevin M.
Audu, Musa L.
Triolo, Ronald J.
author_facet Friederich, Aidan R. W.
Lombardo, Lisa M.
Foglyano, Kevin M.
Audu, Musa L.
Triolo, Ronald J.
author_sort Friederich, Aidan R. W.
collection PubMed
description Spinal cord injury (SCI) can cause paralysis of trunk and hip musculature that negatively impacts seated balance and ability to lean away from an upright posture and interact fully with the environment. Constant levels of electrical stimulation of peripheral nerves can activate typically paralyzed muscles and aid in maintaining a single upright seated posture. However, in the absence of a feedback controller, such seated postures and leaning motions are inherently unstable and unable to respond to perturbations. Three individuals with motor complete SCI who had previously received a neuroprosthesis capable of activating the hip and trunk musculature volunteered for this study. Subject-specific muscle synergies were identified through system identification of the lumbar moments produced via neural stimulation. Synergy-based calculations determined the real-time stimulation parameters required to assume leaning postures. When combined with a proportional, integral, derivative (PID) feedback controller and an accelerometer to infer trunk orientation, all individuals were able to assume non-erect postures of 30–40° flexion and 15° lateral bending. Leaning postures increased forward reaching capabilities by 10.2, 46.7, and 16 cm respectively for each subject when compared with no stimulation. Additionally, the leaning controllers were able to resist perturbations of up to 90 N, and all subjects perceived the leaning postures as moderately to very stable. Implementation of leaning controllers for neuroprostheses have the potential of expanding workspaces, increasing independence, and facilitating activities of daily living for individuals with paralysis.
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spelling pubmed-105681312023-10-13 Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis Friederich, Aidan R. W. Lombardo, Lisa M. Foglyano, Kevin M. Audu, Musa L. Triolo, Ronald J. Front Rehabil Sci Rehabilitation Sciences Spinal cord injury (SCI) can cause paralysis of trunk and hip musculature that negatively impacts seated balance and ability to lean away from an upright posture and interact fully with the environment. Constant levels of electrical stimulation of peripheral nerves can activate typically paralyzed muscles and aid in maintaining a single upright seated posture. However, in the absence of a feedback controller, such seated postures and leaning motions are inherently unstable and unable to respond to perturbations. Three individuals with motor complete SCI who had previously received a neuroprosthesis capable of activating the hip and trunk musculature volunteered for this study. Subject-specific muscle synergies were identified through system identification of the lumbar moments produced via neural stimulation. Synergy-based calculations determined the real-time stimulation parameters required to assume leaning postures. When combined with a proportional, integral, derivative (PID) feedback controller and an accelerometer to infer trunk orientation, all individuals were able to assume non-erect postures of 30–40° flexion and 15° lateral bending. Leaning postures increased forward reaching capabilities by 10.2, 46.7, and 16 cm respectively for each subject when compared with no stimulation. Additionally, the leaning controllers were able to resist perturbations of up to 90 N, and all subjects perceived the leaning postures as moderately to very stable. Implementation of leaning controllers for neuroprostheses have the potential of expanding workspaces, increasing independence, and facilitating activities of daily living for individuals with paralysis. Frontiers Media S.A. 2023-09-28 /pmc/articles/PMC10568131/ /pubmed/37841066 http://dx.doi.org/10.3389/fresc.2023.1222174 Text en © 2023 Friederich, Lombardo, Foglyano, Audu and Triolo. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (https://creativecommons.org/licenses/by/4.0/) . The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Rehabilitation Sciences
Friederich, Aidan R. W.
Lombardo, Lisa M.
Foglyano, Kevin M.
Audu, Musa L.
Triolo, Ronald J.
Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
title Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
title_full Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
title_fullStr Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
title_full_unstemmed Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
title_short Stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
title_sort stabilizing leaning postures with feedback controlled functional neuromuscular stimulation after trunk paralysis
topic Rehabilitation Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10568131/
https://www.ncbi.nlm.nih.gov/pubmed/37841066
http://dx.doi.org/10.3389/fresc.2023.1222174
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