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Related Experiment Videos

Velar stretch as a function of task.

R K Simpson, L Chin

    The Cleft Palate Journal
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Velar stretch, or the elongation of the soft palate, varied significantly based on speech sounds and blowing. This study found greater velar stretch during /u/ and blowing compared to /alpha/ and /epsilon/ sounds.

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    Area of Science:

    • Speech Science
    • Biomechanics of Speech Production
    • Anatomy and Physiology

    Background:

    • Understanding velar movement is crucial for speech production and understanding velopharyngeal function.
    • Previous research has explored velar kinematics, but detailed analysis of velar stretch during specific speech tasks is less common.

    Purpose of the Study:

    • To quantify velar stretch in young adults during the production of specific vowels (/alpha/, /epsilon/, /u/) and non-speech blowing tasks.
    • To compare velar stretch measurements obtained via two different methods (nasal surface vs. midline).
    • To investigate potential correlations between velar stretch and anatomical/physiological measures.

    Main Methods:

    • Cephalometric X-rays were used to measure velar length in 20 healthy young adults.

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  • Measurements were taken along the nasal surface and the midline of the velum.
  • Velar stretch was analyzed during the production of vowels /alpha/, /epsilon/, /u/, and during a blowing task.

    • Main Results:

    • No significant sex-based differences in velar stretch were observed.
    • Nasal surface measurements revealed significantly greater velar stretch during /u/ and blowing compared to /alpha/ and /epsilon/.
    • Midline measurements showed significant differences only between blowing and /alpha/ or /epsilon/.

    Conclusions:

    • Velar stretch is influenced by the specific speech sound or aerodynamic task.
    • The method of measurement (nasal surface vs. midline) affects the observed velar stretch patterns.
    • Significant correlations were found between velar stretch and measures like need ratio and velar height, suggesting biomechanical relationships.