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  • Title: Involvement of head movement in speech production and its implications for language pathology.
    Author: Hadar U, Steiner TJ, Rose FC.
    Journal: Adv Neurol; 1984; 42():247-61. PubMed ID: 6209950.
    Abstract:
    Analysis of head movement during speech, monitored by the polarized light goniometer, showed that head movement accompanies speech almost continuously in a manner specific to the concomitant, suprasegmental speech features. Thus initiation of speech after long pauses was accompanied by wide, linear movements (PS). The termination of speech in a pause (terminal juncture) was accompanied by movements of medium amplitudes and frequencies (OM). Sharp, intense movements (RM) were indicative of a peak in loudness, and often of a major phonetic stress. Finally, a speech disturbance was accompanied by movement if it involved a sharp prosodic transition. We suggest that these correlations indicate that head movement may have a role in speech production, regulating the many degrees of freedom and the dissipation of energy in speech. Furthermore, head movements may play a role in linguistic processing through the generative functions of stress, prominence, and orienting responses. Implications for speech pathology, especially dysphasia, are discussed.
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