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Related Experiment Videos

Functional segments in tongue movement.

Maureen Stone1, Melissa A Epstein, Khalil Iskarous

  • 1Vocal Tract Visualization Lab, Department of Biomedical Sciences, University of Maryland Dental School, Baltimore, Maryland, USA. mstone@umaryland.edu

Clinical Linguistics & Phonetics
|December 3, 2004
PubMed
Summary
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This study investigated tongue segment independence during speech production. Findings reveal that while some movements are constrained by biomechanics, others show independent control influenced by linguistic factors.

Area of Science:

  • Speech Science
  • Biomechanics
  • Linguistics

Background:

  • The tongue is a complex, deformable organ crucial for speech production.
  • Understanding tongue segment coordination is key to deciphering speech articulation.
  • Previous research has not fully elucidated the independent control of distinct tongue segments.

Purpose of the Study:

  • To examine the independence of five proposed functional tongue segments during speech.
  • To differentiate between passive biomechanical constraints and active independent control of tongue segments.
  • To investigate the influence of physiological and linguistic factors on tongue segment coordination.

Main Methods:

  • Utilized ultrasound and tagged Cine-Magnetic Resonance Imaging (Cine-MRI) across three studies.

Related Experiment Videos

  • Analyzed correlations between movements of different tongue segments.
  • Correlated movement patterns with specific phonemic content during speech tasks.

    • Main Results:

    • Observed high correlations between adjacent tongue segments, suggesting physiological constraints.
    • Detected negative correlations between distant segments, indicating coordinated opposing movements.
    • Found that correlations between segments varied based on the phonemes being produced, pointing to linguistic influences.

    Conclusions:

    • Tongue segment coordination is influenced by both passive biomechanical limitations and active, independent control.
    • Linguistic context plays a significant role in modulating tongue segment movements during speech.
    • The findings support a model where distinct tongue segments can be controlled independently under certain conditions.