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Related Experiment Videos

Lateral preference in mastication: an electromyographic study.

L V Christensen, J T Radue

    Journal of Oral Rehabilitation
    |September 1, 1985
    PubMed
    Summary
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    Electromyography accurately predicts chewing side by analyzing masseter muscle activity during gum chewing. This electromyographic chewing pattern analysis reliably identifies the dominant side of mastication.

    Area of Science:

    • Biomedical Engineering
    • Neuroscience
    • Dental Science

    Background:

    • Mastication involves complex neuromuscular coordination.
    • Electromyography (EMG) is a key tool for assessing muscle activity during chewing.
    • Understanding chewing side dominance is crucial for dental and neurological studies.

    Purpose of the Study:

    • To investigate the correlation between specific electromyographic (EMG) chewing patterns and the preferred side of mastication.
    • To determine if EMG can reliably predict the dominant chewing side.

    Main Methods:

    • Twelve subjects chewed gum for varying durations (15, 20, 25 seconds).
    • Gum bolus placement was visually assessed.
    • Surface electromyography measured masseter muscle activity on both chewing and non-chewing sides.

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    Main Results:

    • Electromyographic observations reliably predicted consistent right-sided and left-sided gum bolus placement.
    • Prediction was less reliable for predominant left-sided placement due to two subjects' deviant patterns.
    • Agreement between presumed chewing side and predictive EMG patterns was 78% (P < 0.001).

    Conclusions:

    • Surface electromyography is a reliable method for predicting the dominant chewing side.
    • EMG analysis of masseter muscle activity offers insights into masticatory neuromuscular control.
    • This technique can aid in diagnosing and understanding chewing-related disorders.