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Related Experiment Videos

Influence of visual feedback on human isometric bite-force tremor

M L Broekhuijsen1, J D van Willigen

  • 1Department of Neurobiology and Oral Physiology, University of Groningen, The Netherlands.

Archives of Oral Biology
|February 1, 1994
PubMed
Summary

Visual feedback significantly impacts force tremor spectrum during forceful bites. This visual feedback loop, influencing the 3-5 Hz range, suggests reaction times between 100-200 ms.

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Area of Science:

  • Biomechanics
  • Neuroscience
  • Motor Control

Background:

  • Recent reports suggested limited visual feedback influence on bite force tremor.
  • Understanding sensorimotor control during forceful oral tasks is crucial.

Purpose of the Study:

  • To investigate the influence of visual feedback on the force tremor spectrum during isometric forceful biting.
  • To quantify spectral changes and infer feedback loop characteristics.

Main Methods:

  • Isometric forceful bite task with and without visual feedback.
  • Analysis of force tremor spectrum using 'half-value frequency' (f1/2).
  • Measurement of visual/oral reaction times.

Main Results:

  • Visual feedback significantly altered the force tremor spectrum.

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  • A larger amplitude contribution in the 3-5 Hz range was observed with visual feedback.
  • Elevations in the 3-5 Hz range suggest a visual feedback loop with a time constant (tau) of 100-200 ms.

    • Conclusions:

    • Visual feedback plays a significant role in modulating force tremor during forceful biting.
    • The observed spectral changes are consistent with a visual feedback loop operating within human reaction time limits.
    • Findings contrast with previous studies, highlighting the importance of visual input in motor control of biting.