Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects
Trunk stability is important for adequate arm function due to their kinematic linkage. People with Duchenne muscular dystrophy (DMD) can benefit from trunk-assistive devices for seated daily activities, but existing devices limit trunk movement to forward bending. We developed a new trunk orthosis t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/24/8366 |
| _version_ | 1827669676685000704 |
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| author | Ahmad Zahid Rao Muhammad Abul Hasan |
| author_facet | Ahmad Zahid Rao Muhammad Abul Hasan |
| author_sort | Ahmad Zahid Rao |
| collection | DOAJ |
| description | Trunk stability is important for adequate arm function due to their kinematic linkage. People with Duchenne muscular dystrophy (DMD) can benefit from trunk-assistive devices for seated daily activities, but existing devices limit trunk movement to forward bending. We developed a new trunk orthosis that has spring and pulley design. This study evaluated orthosis performance with 40 able-bodied subjects under with and without orthosis condition in 20 seated tasks for trunk rotation, forward bending, and side bending movements. Subjects adopted static posture in specific trunk orientation while their muscle activity was recorded. They also rated the subjective scales of perceived exertion and usability. A percent change in muscle activity for each task, due to orthosis use, is reported. Significant muscle activity reductions up to 31% and 65% were observed in lumbar and thoracic erector spinae muscles, respectively. Using three-way ANOVA, we found these reductions to be specific to the task direction and the choice of upper limb that is used to perform the asymmetric tasks. A total of 70% participants reported acceptable usability and ~1-point increase in exertion was found for maximum voluntary reaching with the orthosis. The outcomes of this study are promising, though tested on able-bodied subjects. Hence, orthosis mounted on wheelchairs should be further evaluated on DMD patients. |
| first_indexed | 2024-03-10T03:08:27Z |
| format | Article |
| id | doaj.art-34376c2b1e00461fbea7bdca1ba82eb7 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T03:08:27Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-34376c2b1e00461fbea7bdca1ba82eb72023-11-23T10:30:40ZengMDPI AGSensors1424-82202021-12-012124836610.3390/s21248366Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied SubjectsAhmad Zahid Rao0Muhammad Abul Hasan1Department of Biomedical Engineering, NED University of Engineering and Technology, Karachi 75270, PakistanDepartment of Biomedical Engineering, NED University of Engineering and Technology, Karachi 75270, PakistanTrunk stability is important for adequate arm function due to their kinematic linkage. People with Duchenne muscular dystrophy (DMD) can benefit from trunk-assistive devices for seated daily activities, but existing devices limit trunk movement to forward bending. We developed a new trunk orthosis that has spring and pulley design. This study evaluated orthosis performance with 40 able-bodied subjects under with and without orthosis condition in 20 seated tasks for trunk rotation, forward bending, and side bending movements. Subjects adopted static posture in specific trunk orientation while their muscle activity was recorded. They also rated the subjective scales of perceived exertion and usability. A percent change in muscle activity for each task, due to orthosis use, is reported. Significant muscle activity reductions up to 31% and 65% were observed in lumbar and thoracic erector spinae muscles, respectively. Using three-way ANOVA, we found these reductions to be specific to the task direction and the choice of upper limb that is used to perform the asymmetric tasks. A total of 70% participants reported acceptable usability and ~1-point increase in exertion was found for maximum voluntary reaching with the orthosis. The outcomes of this study are promising, though tested on able-bodied subjects. Hence, orthosis mounted on wheelchairs should be further evaluated on DMD patients.https://www.mdpi.com/1424-8220/21/24/8366Duchenne muscular dystrophy (DMD)electromyography (EMG)exertionorthosisstabilitytrunk |
| spellingShingle | Ahmad Zahid Rao Muhammad Abul Hasan Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects Sensors Duchenne muscular dystrophy (DMD) electromyography (EMG) exertion orthosis stability trunk |
| title | Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects |
| title_full | Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects |
| title_fullStr | Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects |
| title_full_unstemmed | Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects |
| title_short | Evaluation of a Chair-Mounted Passive Trunk Orthosis: A Pilot Study on Able-Bodied Subjects |
| title_sort | evaluation of a chair mounted passive trunk orthosis a pilot study on able bodied subjects |
| topic | Duchenne muscular dystrophy (DMD) electromyography (EMG) exertion orthosis stability trunk |
| url | https://www.mdpi.com/1424-8220/21/24/8366 |
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