Myoelectric Control System and Task-Specific Characteristics Affect Voluntary Use of Simultaneous Control

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
Lauren H SmithLevi J Hargrove

Abstract

Clinically available myoelectric control does not enable simultaneous proportional control of prosthetic degrees of freedom. Multiple studies have proposed systems that provide simultaneous control, though few have investigated whether subjects voluntarily use simultaneous control or how they implement it. Additionally, few studies have explicitly evaluated the effect of providing proportional velocity control. The objective of this study was to evaluate factors influencing when and how subjects use simultaneous myoelectric control, including the ability to proportionally control the velocity and the required task precision. Five able-bodied subjects used simultaneous myoelectric control systems with and without proportional velocity control in a virtual Fitts' Law task. Though subjects used simultaneous control to a substantial degree when proportional velocity control was present, they used very little simultaneous control when using constant-velocity control. Furthermore, use of simultaneous control varied significantly with target distance and width, reflecting a strategy of using simultaneous control for gross cursor positioning and sequential control for fine corrective movements. These results provide insight into how us...Continue Reading

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Nov 15, 2014·Journal of Neural Engineering·Lauren H SmithLevi J Hargrove

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Citations

Aug 21, 2020·Annals of Biomedical Engineering·Chuanxin M NiuNing Lan
Nov 26, 2015·Journal of Neural Engineering·Lauren H SmithLevi J Hargrove

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