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Functionally specific articulatory cooperation following jaw perturbations during speech: evidence for coordinative
Journal of Experimental Psychology. Human Perception and Performance
|December 1, 1984
Summary
Speech articulation adjusts based on the specific sounds being spoken. Lip and tongue movements compensate for jaw perturbations, preventing noticeable speech distortions, indicating flexible speech coordination.
Area of Science:
- Speech motor control
- Articulatory phonetics
- Biomechanics of speech
Background:
- Jaw perturbations can disrupt speech production.
- Understanding articulatory compensation is key to speech motor control research.
Purpose of the Study:
- To investigate how articulatory patterns adapt to jaw perturbations during speech.
- To determine if compensatory movements are utterance-specific.
Main Methods:
- Three experiments involving jaw perturbations during speech production.
- Electromyography to measure muscle activity (lips, tongue).
- Analysis of articulatory responses to controlled jaw force loads and perturbation phases.
Main Results:
- Compensatory movements in lips and tongue were utterance-specific.
- Lip compensation occurred for /b/ in /baeb/, while tongue activity increased for /z/ in /baez/.
- No perceptible speech distortion was observed despite perturbations.
Conclusions:
- Articulatory compensation is flexibly assembled and specific to the speech sounds being produced.
- Findings support the concept of adaptable coordinative structures in speech production.
- Speech motor system demonstrates robustness against mechanical perturbations.