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Influence on force curve exerted by jaw tapping force.

H Suenaga1, T Torisu, T Yoshimatsu

  • 1Graduate School of Dentistry, Nagasaki University, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan. suen@dh.nagasaki-u.ac.jp

Journal of Oral Rehabilitation
|June 26, 2001
PubMed
Summary

This study investigated jaw tapping force regulation using visual biofeedback. Higher target forces led to increased reliance on feedback and adjustments in movement dynamics.

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Area of Science:

  • Biomechanics
  • Motor Control
  • Neuroscience

Background:

  • Understanding the neuromuscular mechanisms underlying voluntary motor tasks like jaw tapping is crucial.
  • Jaw tapping force regulation involves complex sensorimotor integration and feedback processing.
  • Previous research has explored force control but detailed analysis of jaw tapping dynamics with biofeedback is limited.

Purpose of the Study:

  • To investigate how jaw tapping force regulation strategies change with varying target force intensities.
  • To analyze the role of visual biofeedback in modulating jaw tapping force control.
  • To identify key kinematic and kinetic parameters that characterize jaw tapping force adaptation.

Main Methods:

  • Nine healthy participants performed voluntary jaw tapping movements under visual biofeedback.

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  • Participants were instructed to reproduce specific target tapping forces.
  • Measurements included the duration of tooth contact, time to peak force, peak rate of force development (peak dF/dt), and time to peak dF/dt.

    • Main Results:

    • Both the duration of tooth contact and time to peak force significantly increased with higher target forces (P < 0.01).
    • Peak rate of force development (peak dF/dt) also increased significantly with target force (P < 0.01).
    • Increased target force led to a greater dependency on visual feedback information for motor execution.

    Conclusions:

    • Jaw tapping force regulation adapts dynamically to target force demands, involving adjustments in movement duration and force application.
    • Visual biofeedback plays a critical role in modulating jaw tapping force control, particularly at higher intensities.
    • Individual motor control parameters, such as peak dF/dt and time to peak dF/dt, appear to be established pre-movement.