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Normative childhood EMG gait patterns.

R Shiavi, N Green, B McFadyen

    Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
    |January 1, 1987
    PubMed
    Summary
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    Children

    Area of Science:

    • Biomechanics
    • Pediatric Motor Control

    Background:

    • Electromyography (EMG) is crucial for understanding muscle activity during movement.
    • Locomotion in children involves complex neuromuscular patterns that change with development and speed.

    Purpose of the Study:

    • To analyze electromyogram (EMG) envelope patterns in lower extremity muscles during child locomotion.
    • To investigate how walking speed and age affect these EMG patterns.

    Main Methods:

    • Linear envelopes of EMG signals from seven lower extremity muscles were analyzed.
    • Statistical properties and analysis of variance were used to assess pattern variability.
    • Data were collected from children aged 4-11 years during walking.

    Main Results:

    Related Experiment Videos

    • All studied muscles exhibited altered EMG patterns with varying walking speeds.
    • Changes included modifications in activity phase intensity and the emergence of new phases.
    • EMG patterns became more consistent as walking speed increased.
    • Significant age-related differences were observed only in two thigh muscles.

    Conclusions:

    • Walking speed significantly influences lower extremity muscle activation patterns in children.
    • Neuromuscular control strategies adapt to increase gait stability at higher speeds.
    • Age-related maturation effects on EMG patterns are muscle-specific within the 4-11 year range.