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Related Experiment Videos

Lip and tongue function in multiple sclerosis: A physiological analysis

B E Murdoch1, T J Spencer, D G Theodoros

  • 1Motor Speech Research Unit, Department of Speech Pathology & Audiology, The University of Queensland, Brisbane, 4072, Australia.

Motor Control
|June 30, 1998
PubMed
Summary
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Adults with multiple sclerosis (MS) show impaired tongue function, including reduced strength and endurance, impacting speech articulation. Lip function remained unaffected in this study.

Area of Science:

  • Neurology
  • Speech-Language Pathology

Background:

  • Multiple sclerosis (MS) can affect motor control, potentially impacting speech articulation.
  • Previous research suggests speech difficulties in MS, but detailed physiological analysis is limited.

Purpose of the Study:

  • To physiologically analyze the articulatory function in adults with MS.
  • To compare tongue and lip motor control between MS speakers and healthy controls.

Main Methods:

  • Used lip and tongue transduction systems to measure articulatory function.
  • Included 16 adults with MS and 16 matched healthy controls.
  • Assessed tongue strength, endurance, and repetitive movement rate.

Main Results:

  • MS speakers exhibited significantly reduced tongue strength, endurance, and repetitive movement rate compared to controls.

Related Experiment Videos

  • Preclinical lingual dysfunction was observed in non-dysarthric MS speakers.
  • No significant lip dysfunction was detected in MS speakers on physiological or perceptual measures.

    • Conclusions:

    • Physiological deficits in tongue function correlate with observed speech impairments in MS.
    • Lingual dysfunction is an early indicator in MS, even before overt dysarthria.
    • Lip function appears preserved in adults with MS, suggesting targeted speech therapy may be beneficial.