Document Detail

Influence of feedback parameters on performance of a vibrotactile balance prosthesis.
MedLine Citation:
PMID:  19497820     Owner:  NLM     Status:  MEDLINE    
We investigated the influence of feedback conditions on the effectiveness of a balance prosthesis. The balance prosthesis used an array of 12 tactile vibrators (tactors) placed on the anterior and posterior surfaces of the torso to provide body orientation feedback related to several different combinations of angular position and velocity of body sway in the sagittal plane. Control tests were performed with no tactor activation. Body sway was evoked in subjects with normal sensory function by rotating the support surface upon which subjects stood with eyes closed. Body sway was analyzed by computing root mean square sway measures and by a frequency-response function analysis that characterized the amplitude (gain) and timing (phase) of body sway over a frequency range of 0.017-2.2 Hz. Root mean square sway measures showed a reduction of surface stimulus evoked body sway for most vibrotactile feedback settings compared to control conditions. However, frequency-response function analysis showed that the sway reduction was due primarily to a reduction in sway below about 0.5 Hz, whereas there was actually an enhancement of sway above 0.6 Hz. Finally, we created a postural model that accounted for the experimental results and gave insight into how vibrotactile information was incorporated into the postural control system.
Adam D Goodworth; Conrad Wall; Robert J Peterka
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2009-06-02
Journal Detail:
Title:  IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society     Volume:  17     ISSN:  1558-0210     ISO Abbreviation:  IEEE Trans Neural Syst Rehabil Eng     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-08-13     Completed Date:  2009-10-28     Revised Date:  2013-07-10    
Medline Journal Info:
Nlm Unique ID:  101097023     Medline TA:  IEEE Trans Neural Syst Rehabil Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  397-408     Citation Subset:  IM    
Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA.
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MeSH Terms
Computer Simulation
Equipment Design
Equipment Failure Analysis
Models, Biological*
Movement Disorders / physiopathology*,  rehabilitation*
Prostheses and Implants*
Reproducibility of Results
Sensitivity and Specificity
Vibration / therapeutic use
Grant Support
AG 17960/AG/NIA NIH HHS; DC 6201/DC/NIDCD NIH HHS; R01 AG017960/AG/NIA NIH HHS; R01 AG017960-07/AG/NIA NIH HHS; R01 DC006201-04/DC/NIDCD NIH HHS; T32 DC 005945/DC/NIDCD NIH HHS; T32 DC005945-02/DC/NIDCD NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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