Effects of pulse modulation on FES-induced ankle dorsiflexion in adults with spastic diplegia

I. Y. W. SU, Hung Kay Daniel CHOW, M. H. GRANAT, B. A. CONWAY

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The application of function electrical stimulation (FES) has recently been extended to patients with cerebral palsy. To ensure a functional gain from the electrically elicited movement, a reproducible response with sufficient magnitude is desired. In this study, the effects of varying pulse parameters on the motor response were investigated. FES-induced ankle dorsiflexion of seven adults with spastic diplegia under constant current stimulation buth with varied pulsewidths and frequencies was measured. Stimulation pattern that produced a desired motor response was determined for each individual subject. Despite the diversity of the conditions caused by cerebral palsy, a common trend was observed from the identified patterns. The characterization results suggested that the FES-induced ankle dorsiflexion in adults with spastic diplegia could be controlled by employing a constant current with frequency at 20 or 30 Hz using pulsewidth modulation ranged from 100 to 400 μs. Copyright © 2000 IEEE.

Original languageEnglish
Title of host publicationProceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
EditorsJohn D. ENDERLE
Place of PublicationDanvers, MA
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2267-2270
Volume3
ISBN (Print)0780364651
DOIs
Publication statusPublished - 2000

Fingerprint

Cerebral Palsy
Ankle
Electric Stimulation

Citation

Su, I. Y. W., Chow, D. H. K., Granat, M. H., & Conway, B. A. (2000). Effects of pulse modulation on FES-induced ankle dorsiflexion in adults with spastic diplegia. In J. D. Enderle (Ed.), Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (pp. 2267-2270). Danvers, MA: IEEE.