Cheng, Richard and Burdick, Joel W. (2018) Extraction of Muscle Synergies in Spinal Cord Injured Patients. In: 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE , Piscataway, NJ, pp. 2623-2626. ISBN 978-1-5386-3646-6. https://resolver.caltech.edu/CaltechAUTHORS:20181102-142613215
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Abstract
Muscle synergies encode motor activity as a linear superposition of multiple motor units composed of a temporal command exciting a specific network of muscles. This study examines muscle synergies derived from simple standing studies of a complete spinal cord injury (SCI) patient under epidural spinal stimulation. A popular technique for extracting these synergies from EMG data is non-negative matrix factorization (NNMF). However, standard NNMF algorithms do not allow for physiological delays for a neural signal to reach different muscles. These delays are prevalent in SCI patients under spinal stimulation, and so we propose a new algorithm (regularized ShiftNMF) to extract muscle synergies which account for signal delays. We find muscle synergies extracted by the regularized ShiftNMF algorithm are significantly better at reconstructing EMG activity, and the resulting features are physiologically consistent and more useful in describing patient behavior.
| Item Type: | Book Section | |||||||||
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| Additional Information: | © 2018 IEEE. The authors thank Yanan Sui for collecting and sharing the experimental dataset and for many helpful conversations. | |||||||||
| DOI: | 10.1109/EMBC.2018.8512763 | |||||||||
| Record Number: | CaltechAUTHORS:20181102-142613215 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20181102-142613215 | |||||||||
| Official Citation: | R. Cheng and J. W. Burdick, "Extraction of Muscle Synergies in Spinal Cord Injured Patients," 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Honolulu, HI, USA, 2018, pp. 2623-2626. doi: 10.1109/EMBC.2018.8512763 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 90619 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 02 Nov 2018 22:05 | |||||||||
| Last Modified: | 16 Nov 2021 03:34 |
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