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Related Experiment Videos

Jaw-phonatory coordination in chronic developmental stuttering.

Torrey M J Loucks1, Luc F De Nil, Jayanthi Sasisekaran

  • 1Graduate Department of Speech-Language Pathology, Rehabilitation Sciences Building, Room 160, University of Toronto, 500 University Avenue, Toronto, Ont. M5G1V7, Canada. louckst@ninds.nih.gov

Journal of Communication Disorders
|August 8, 2006
PubMed
Summary

Adults who stutter show impaired jaw-phonatory coordination, suggesting a sensorimotor deficit. This oral proprioceptive limitation may contribute to developmental stuttering, impacting speech motor control.

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Area of Science:

  • Neuroscience
  • Speech-language pathology
  • Motor control

Background:

  • Developmental stuttering may involve sensorimotor integration deficits.
  • Oral sensorimotor function is crucial for speech production.

Purpose of the Study:

  • To investigate oral sensorimotor function in adults who stutter.
  • To test the hypothesis of deficient jaw-phonatory coordination in stuttering.

Main Methods:

  • Adapted a limb coordination task for oral-phonatory coordination.
  • Required participants to initiate phonation during jaw opening through a spatial target.
  • Varied target amplitude and jaw movement speed.

Main Results:

  • Adult stutterers exhibited significantly higher movement error and spatial variability.

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  • No significant group differences were found in movement velocity or duration.
  • Aberrant coordination suggests potential oral proprioceptive or motor control deficits.

    • Conclusions:

    • Stuttering is associated with impaired jaw-phonatory coordination.
    • Findings support a sensorimotor deficit, possibly oral proprioception limitation, in stuttering.
    • The results are also consistent with broader motor control deficits.