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GriFT: A Device for Quantifying Physiological and Pathological Mirror Movements in Children.

Ellen Jaspers, Katrijn Klingels, Cristina Simon-Martinez

    IEEE Transactions on Bio-Medical Engineering
    |July 11, 2017
    PubMed
    Summary

    This study introduces the grip force tracking (GriFT) device for quantitatively assessing mirror movements (MM) in children. The GriFT device shows high sensitivity in categorizing physiological MM and clinical applicability for children with unilateral cerebral palsy.

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    Area of Science:

    • Neuroscience
    • Motor Control
    • Pediatric Neurology

    Background:

    • Mirror movements (MM) are involuntary actions in the passive limb mirroring voluntary movements.
    • MM are typical in children but diminish with age.
    • Current MM assessment relies on subjective ordinal scales, limiting clinical utility.

    Purpose of the Study:

    • To introduce and validate the grip force tracking (GriFT) device for quantitative MM assessment.
    • To assess the feasibility and clinical applicability of GriFT in children.
    • To explore GriFT's potential for diagnosing and managing neurological disorders like unilateral cerebral palsy.

    Main Methods:

    • Developed a portable grip force tracking (GriFT) system with force sensors.
    • Children performed repetitive unimanual squeezing tasks synchronized with a computer game.
    • MM were analyzed based on frequency, amplitude, and temporal synchronization features.

    Main Results:

    • The GriFT device demonstrated feasibility and validity in typically developing children (N=174, ages 5-15).
    • MM frequency and amplitude were key discriminators between clinical MM scores.
    • Physiological MM categorization achieved high sensitivity (89%-97%).

    Conclusions:

    • The GriFT device offers a quantitative and sensitive method for MM assessment.
    • The system shows clinical applicability for children with unilateral cerebral palsy.
    • Quantitative MM analysis is a promising tool for research and clinical practice in pediatric neurology.