Resolving the limb position effect in myoelectric pattern recognition.
2011 (English)In: IEEE transactions on neural systems and rehabilitation engineering, ISSN 1534-4320, E-ISSN 1558-0210, Vol. 19, no 6, 644-51 p.Article in journal (Refereed) Published
Reported studies on pattern recognition of electromyograms (EMG) for the control of prosthetic devices traditionally focus on classification accuracy of signals recorded in a laboratory. The difference between the constrained nature in which such data are often collected and the unpredictable nature of prosthetic use is an example of the semantic gap between research findings and a viable clinical implementation. In this paper, we demonstrate that the variations in limb position associated with normal use can have a substantial impact on the robustness of EMG pattern recognition, as illustrated by an increase in average classification error from 3.8% to 18%. We propose to solve this problem by: 1) collecting EMG data and training the classifier in multiple limb positions and by 2) measuring the limb position with accelerometers. Applying these two methods to data from ten normally limbed subjects, we reduce the average classification error from 18% to 5.7% and 5.0%, respectively. Our study shows how sensor fusion (using EMG and accelerometers) may be an efficient method to mitigate the effect of limb position and improve classification accuracy.
Place, publisher, year, edition, pages
2011. Vol. 19, no 6, 644-51 p.
electromyography, EMG, myoelectric, myoelectric signal, surface EMG, sEMG, proportional, prosthesis, upper limb, hand prosthesis, prosthesis control, myoelectric control, proportional control, simultaneous proportional control, robust control, sensor fusion, multimodal approach, artifact cancellation, artifact suppression, prosthesis use, prosthesis user, amputee, outcome measure, pattern recognition, rehabilitation, biomedical engineering
IdentifiersURN: urn:nbn:no:ntnu:diva-20621DOI: 10.1109/TNSRE.2011.2163529PubMedID: 21846608OAI: oai:DiVA.org:ntnu-20621DiVA: diva2:615289
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