A classification method for myoelectric control of hand prostheses inspired by muscle coordination

Patel GK, Hahne JM, Farina D, Dosen S, Castellini C (2018)

Publication Type: Journal article

Publication year: 2018

Journal

IEEE Transactions on Neural Systems and Rehabilitation Engineering Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 26

Pages Range: 1745-1755

Article Number: 8423713

Journal Issue: 9

DOI: 10.1109/TNSRE.2018.2861774

Abstract

Dexterous upper limb myoelectric prostheses can, to some extent, restore the motor functions lost after an amputation. However, ensuring the reliability of myoelectric control is still an open challenge. In this paper, we propose a classification method that exploits the regularity in muscle activation patterns (uniform scaling) across different force levels within a given movement class. This assumption leads to a simple training procedure, using training data collected at single contraction intensity for each movement class. The proposed method was compared to the widely accepted benchmark [linear discriminant analysis (LDA) classifier] using off-line and online evaluation. The off-line classification errors obtained with the new method were either lower or higher than LDA depending upon the chosen feature set. In the online evaluation, the new classification method was operated using amplitude-EMG features and compared to the state-of-the-art LDA classifier combined with the time domain feature set. The online evaluation was performed in 11 able-bodied and one amputee subject using a set of four functional tasks mimicking daily-life activities. The tasks assessed the dexterity (e.g., switching between functions) and robustness of control (e.g., handling heavy objects). With the new classification scheme, the amputee performed better in all functional tasks, whereas the able-bodied subjects performed significantly better in three out of four functional tasks. Overall, the novel method outperformed the state-of-the-art approach (LDA) while utilizing less training data and a smaller feature set. The proposed method is, therefore, a simple but effective and robust classification scheme, convenient for online implementation and clinical use.

Authors with CRIS profile

Claudio Castellini

Involved external institutions

Universitätsklinikum Göttingen DE Germany (DE) Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) / German Aerospace Center DE Germany (DE)

How to cite

APA:

Patel, G.K., Hahne, J.M., Farina, D., Dosen, S., & Castellini, C. (2018). A classification method for myoelectric control of hand prostheses inspired by muscle coordination. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 26(9), 1745-1755. https://dx.doi.org/10.1109/TNSRE.2018.2861774

MLA:

Patel, Gauravkumar K., et al. "A classification method for myoelectric control of hand prostheses inspired by muscle coordination." IEEE Transactions on Neural Systems and Rehabilitation Engineering 26.9 (2018): 1745-1755.

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