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

Ivan Y. W. Su, Daniel H. K. Chow, Malcolm H. Granat, Bernard A. Conway

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

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.

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 PublicationPiscataway, NJ
PublisherIEEE
Pages2267-2270
Number of pages4
ISBN (Print)0780364651
DOIs
Publication statusPublished - 6 Aug 2002
Event22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Navy Pier Convention Center, Chicago, United States
Duration: 23 Jul 200028 Jul 2000

Conference

Conference22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CountryUnited States
CityChicago
Period23/07/0028/07/00

Keywords

  • cerebral palsy
  • electrical stimulation
  • rehabilitation

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