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Related Experiment Videos

Clenched jaw jerks in children

S D Josell, J A Yaeger, T Gay

    Journal of Dental Research
    |September 1, 1982
    PubMed
    Summary

    Masseter muscle silent periods and jaw jerk latency showed no significant differences across primary, mixed, and permanent dental development stages in children. This suggests consistent neuromuscular responses regardless of dental maturity.

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    Area of Science:

    • Neurology
    • Dentistry
    • Biomedical Engineering

    Background:

    • The masseter muscle plays a crucial role in mastication and jaw movements.
    • Understanding neuromuscular responses, such as silent periods, is vital for assessing muscle function.
    • Dental development stages may influence muscle physiology, but data on masseter silent periods is limited.

    Purpose of the Study:

    • To investigate masseter muscle silent periods and jaw jerk latency in children.
    • To compare these neuromuscular parameters across different dental development stages (primary, mixed, permanent).
    • To determine if dental maturity affects masseter muscle silent period duration and latency.

    Main Methods:

    • Electromyography (EMG) using surface electrodes was performed on 24 children.
    • Participants were categorized into three dental development groups.
    • Data on EMG, timing code, and microphone input were recorded and analyzed from oscillograph recordings.

    Main Results:

    • Latency and silent period durations of clenched jaw jerks were found to be similar across all three dental development groups.
    • The mean latency duration for the masseter muscle was 14.9 milliseconds.
    • The mean silent period duration for the masseter muscle was 27.0 milliseconds.

    Conclusions:

    • Masseter muscle silent period and jaw jerk latency are consistent across primary, mixed, and permanent dental development stages in children.
    • Neuromuscular jaw jerk responses appear independent of the stage of dental development.
    • These findings contribute to understanding the developmental trajectory of masticatory muscle function.

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