• Neuromodulation · Jul 2004

    Feasibility of gait event detection using intramuscular electromyography in the child with cerebral palsy.

    • Richard T Lauer, Brian T Smith, Dan Coiro, Randal R Betz, and James McCarthy.
    • Shriners Hospitals for Children, Philadelphia Pennsylvania.
    • Neuromodulation. 2004 Jul 1;7(3):205-13.

    AbstractThe objective of this study was to develop and test the feasibility of a model that employs electromyographic (EMG) signals to predict the occurrence of gait events in the child with cerebral palsy (CP). This model could be the basis of a future functional electrical stimulation (FES) control system to assist gait. Two children were implanted with bifilar intramuscular electrodes into the quadriceps muscle bilaterally. Muscle activity and gait parameters were recorded, and a fuzzy inference system was used to correlate EMG to five distinct gait events. For nine of the 10 gait events evaluated, the model predicted gait events to within 82 ms on average, as referenced to the VICON motion analysis system. For eight of the 10 events, prediction errors were 0.3% or less. Results indicate that EMG from the proximal musculature could be used to predict the occurrence of gait events in these two children with CP.

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