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Tongue-surface movement patterns during speech and swallowing.

Jordan R Green¹, Yu-Tsai Wang

¹Department of Communicative Disorders, University of Wisconsin-Madison, 1975 Willow Drive, Madison, Wisconsin 53706, USA.

The Journal of the Acoustical Society of America

|May 27, 2003

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This study reveals distinct tongue movement patterns during speech and swallowing. Analysis of tongue coupling demonstrates functional independence in anterior tongue regions, crucial for understanding speech articulation.

Area of Science:

Linguistics
Biomechanics
Speech Science

Background:

The tongue is often viewed as multiple independent articulators.
Understanding tongue's functional regionality is key for speech production and swallowing research.

Purpose of the Study:

To quantify the coupling strength among four tongue locations.
To differentiate tongue movement patterns during speech versus swallowing.
To investigate functional regionality within the tongue.

Main Methods:

Utilized the x-ray microbeam database to track vertical displacements of pellets on the tongue.
Analyzed tongue movements from 46 participants reciting vowel-consonant-vowel (VCV) utterances and swallowing water.
Computed covariance between vertical time-histories of pellet pairs to quantify movement coupling.

Related Experiment Videos

Main Results:

Observed predictable variations in tongue coupling strength with place of articulation, indicating phonemic differentiation.
Tongue displacements during speech and swallowing formed distinct clusters based on coupling profiles.
Demonstrated functional independence of anterior tongue regions through diverse coupling relations.

Conclusions:

Tongue movement coupling analysis effectively characterizes speech and swallowing behaviors.
Evidence supports functional regionality within the tongue, particularly anterior independence.
Covariance analysis provides a robust method for studying tongue biomechanics.