Detection of the Intention to Grasp during Reaching in Stroke Using Inertial Sensing

A. L. Van Ommeren*, B. Sawaryn, G. B. Prange-Lasonder, J. H. Buurke, J. S. Rietman, P. H. Veltink

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    To support stroke survivors in activities of daily living, wearable soft-robotic gloves are being developed. An essential feature for use in daily life is detection of movement intent to trigger actuation without substantial delays. To increase efficacy, the intention to grasp should be detected as soon as possible, while other movements are not detected instead. Therefore, the possibilities to classify reach and grasp movements of stroke survivors, and to detect the intention of grasp movements, were investigated using inertial sensing. Hand and wrist movements of 10 stroke survivors were analyzed during reach and grasp movements using inertial sensing and a Support Vector Machine classifier. The highest mean accuracies of 96.8% and 83.3% were achieved for single- and multi-user classification respectively. Accuracies up to 90% were achieved when using 80% of the movement length, or even only 50% of the movement length after choosing the optimal kernel per person. This would allow for an earlier detection of 300-750ms, but at the expense of accuracy. In conclusion, inertial sensing combined with the Support Vector Machine classifier is a promising method for actuation of grasp-supporting devices to aid stroke survivors in activities of daily living. Online implementation should be investigated in future research.

    Original languageEnglish
    Article number8844826
    Pages (from-to)2128-2134
    Number of pages7
    JournalIEEE transactions on neural systems and rehabilitation engineering
    Volume27
    Issue number10
    DOIs
    Publication statusPublished - 8 Oct 2019

    Keywords

    • assistive technology
    • grasp intention
    • inertial sensing
    • machine learning
    • soft-robotic glove
    • Stroke

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