Journal article
Effects of Concurrent and Terminal Visual Feedback on Ankle Co-Contraction in Older Adults during Standing Balance
Sensors (Basel, Switzerland), Vol.21(21), p.7305
11/02/2021
DOI: 10.3390/s21217305
Abstract
This preliminary investigation studied the effects of concurrent and terminal visual feedback during a standing balance task on ankle co-contraction, which was accomplished via surface electromyography of an agonist–antagonist muscle pair (medial gastrocnemius and tibialis anterior muscles). Two complementary mathematical definitions of co-contraction indices captured changes in ankle muscle recruitment and modulation strategies. Nineteen healthy older adults received both feedback types in a randomized order. Following an analysis of co-contraction index reliability as a function of surface electromyography normalization technique, linear mixed-effects regression analyses revealed participants learned or utilized different ankle co-contraction recruitment (i.e., relative muscle pair activity magnitudes) and modulation (i.e., absolute muscle pair activity magnitudes) strategies depending on feedback type and following the cessation of feedback use. Ankle co-contraction modulation increased when concurrent feedback was used and significantly decreased when concurrent feedback was removed. Ankle co-contraction recruitment and modulation did not significantly change when terminal feedback was used or when it was removed. Neither ankle co-contraction recruitment nor modulation was significantly different when concurrent feedback was used compared to when terminal feedback was used. The changes in ankle co-contraction recruitment and modulation were significantly different when concurrent feedback was removed as compared to when terminal feedback was removed. Finally, this study found a significant interaction between feedback type, removal of feedback, and order of use of feedback type. These results have implications for the design of balance training technologies using visual feedback.
Details
- Title: Subtitle
- Effects of Concurrent and Terminal Visual Feedback on Ankle Co-Contraction in Older Adults during Standing Balance
- Creators
- Rachel V Vitali - University of IowaVincent J Barone - University of MichiganJamie Ferris - University of MichiganLeia A Stirling - University of MichiganKathleen H Sienko - University of Michigan
- Resource Type
- Journal article
- Publication Details
- Sensors (Basel, Switzerland), Vol.21(21), p.7305
- DOI
- 10.3390/s21217305
- ISSN
- 1424-8220
- eISSN
- 1424-8220
- Language
- English
- Date published
- 11/02/2021
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984201538902771
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