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Related Experiment Videos

Segmental timing in amyotrophic lateral sclerosis.

K Tjaden1, G Turner

  • 1Department of Communicative Disorders and Sciences, State University of New York at Buffalo, 14214-3005, USA. Tjaden@acsu.buffalo.edu

Journal of Speech, Language, and Hearing Research : JSLHR
|July 6, 2000
PubMed
Summary
This summary is machine-generated.

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Speakers with Amyotrophic Lateral Sclerosis (ALS) show altered segmental timing, but this does not significantly impact intelligibility. Their speech timing patterns resemble voluntarily slowed speech in healthy individuals.

Area of Science:

  • Speech Science
  • Neurology
  • Linguistics

Background:

  • Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disease affecting motor neurons.
  • Speech impairments, including altered timing, are common in ALS patients.
  • Understanding segmental timing is crucial for assessing speech intelligibility deficits.

Purpose of the Study:

  • To investigate segmental timing patterns in speakers with ALS.
  • To compare ALS speakers' timing with neurologically healthy speakers at habitual and slow rates.
  • To determine if segmental timing contributes to intelligibility deficits in ALS.

Main Methods:

  • Comparison of segment durations between ALS speakers and matched controls.
  • Analysis of temporal differences for specific sound classes (vowels, fricatives, stop gaps).

Related Experiment Videos

  • Examination of prepausal lengthening in vowels.

    • Main Results:

    • ALS speakers exhibited slowed articulatory rates affecting segmental timing.
    • Segmental timing in ALS broadly aligned with voluntarily slowed speech in controls.
    • Temporal differences for sound classes and prepausal lengthening were largely similar across groups.

    Conclusions:

    • The slowed rate in ALS influences segmental timing but may not be the primary cause of intelligibility issues.
    • Segmental timing patterns in ALS resemble those of healthy individuals speaking slowly.
    • Temporal cues like vowel duration may not be reliable for listeners to perceive speech deficits in ALS.