Optimal Multifield Functional Electrical Stimulation Parameters for the “Turn on the Light” Task and Related Upper Limb Kinematics Repeatability in Poststroke Subjects

Published:November 27, 2020DOI:


      • Reliable functional electrical stimulation parameters assisted the light task.
      • Functional electrical stimulation parameters presented high to very high repeatability.
      • Upper limb kinematics presented high to very high repeatability.



      To characterize the optimal functional electrical stimulation (FES) parameters that assist the turn on the light task (TOTL) on poststroke participants and to analyze the related upper limb (UL) kinematics repeatability.


      Cross-sectional study.


      Human movement research center.


      Poststroke individuals (N=11) with history of a single unilateral stroke that resulted in a motor control dysfunction of the contralesional UL.


      FES based on surface multifield technology applied to the contralesional wrist and finger extensors during the TOTL.

      Main Outcome Measures

      FES outcome metrics (virtual electrodes, stimulation duration, intensity) and kinematic metrics (end-point kinematics [absolute and relative duration, mean and peak velocities, relative instant of peak velocity, index of curvature, number of movement units] and joint kinematics [shoulder, elbow, wrist end position and range of movement]). Outcome measures were assessed 2 times with a 72-hour maximum time interval.


      It was possible to establish reliable FES parameters that assisted the TOTL on poststroke participants. These stimulation parameters led to high to very high repeatability in terms of UL kinematics for most of the cases.


      List of abbreviations:

      95% CI (95% confidence interval), cUL (contralesional upper limb), FE (fingers extension), FES (functional electrical stimulation), ICC (intraclass correlation coefficient), IQR (interquartile range), md (median), MDC95 (minimal detectable change at 95% confidence interval), NMU (number of movement unit), ROM (range of motion), SEM (standard error of measurement), TOTL (turn on the light task), UL (upper limb), VE (virtual electrode), WE (wrist extension), WF (wrist flexion)
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