Task-dependent adjustments to co-stimulation levels in functional neuromuscular stimulation systems

Xia Zhang, Ronald J. Triolo, James Abbas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Many Functional Neuromuscular Stimulation (FNS) systems employ the strategy of co-contracting agonist/antagonist muscle pairs in order to stabilize posture and to resist internal and external disturbances. While increasing stimulation can improve posture control, it comes at a potentially high cost of increased energy expenditure. The suitability of a given co-stimulation level will depend upon the needs of a specific task. In this work, we have developed and investigated a scheme for providing the FNS system user with the ability to adjust co-stimulation levels to meet the needs of a specific task. Musculoskeletal models were used in a series of computer simulation studies to investigate the effect of co-stimulation level on disturbance resistance capability. Based on a cost function, the optimal open-loop co-stimulation level was determined for different weights on effort and controller performance. The results indicate that providing the user with the ability to modify co-stimulation level may be an effective means of adjusting posture in a task-dependent manner.

Original languageEnglish (US)
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages658
Number of pages1
Volume1
ISBN (Print)0780356756
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Fall Meeting of the Biomedical Engineering Society (1st Joint BMES / EMBS) - Atlanta, GA, USA
Duration: Oct 13 1999Oct 16 1999

Other

OtherProceedings of the 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Fall Meeting of the Biomedical Engineering Society (1st Joint BMES / EMBS)
CityAtlanta, GA, USA
Period10/13/9910/16/99

Fingerprint

Cost functions
Muscle
Controllers
Computer simulation
Costs
Energy Metabolism

ASJC Scopus subject areas

  • Bioengineering

Cite this

Zhang, X., Triolo, R. J., & Abbas, J. (1999). Task-dependent adjustments to co-stimulation levels in functional neuromuscular stimulation systems. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 1, pp. 658). Piscataway, NJ, United States: IEEE.

Task-dependent adjustments to co-stimulation levels in functional neuromuscular stimulation systems. / Zhang, Xia; Triolo, Ronald J.; Abbas, James.

Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 1 Piscataway, NJ, United States : IEEE, 1999. p. 658.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhang, X, Triolo, RJ & Abbas, J 1999, Task-dependent adjustments to co-stimulation levels in functional neuromuscular stimulation systems. in Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. vol. 1, IEEE, Piscataway, NJ, United States, pp. 658, Proceedings of the 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Fall Meeting of the Biomedical Engineering Society (1st Joint BMES / EMBS), Atlanta, GA, USA, 10/13/99.
Zhang X, Triolo RJ, Abbas J. Task-dependent adjustments to co-stimulation levels in functional neuromuscular stimulation systems. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 1. Piscataway, NJ, United States: IEEE. 1999. p. 658
Zhang, Xia ; Triolo, Ronald J. ; Abbas, James. / Task-dependent adjustments to co-stimulation levels in functional neuromuscular stimulation systems. Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 1 Piscataway, NJ, United States : IEEE, 1999. pp. 658
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