Integration of auditory and somatosensory error signals in the neural control of speech movements
Identifieur interne : 001A35 ( Ncbi/Curation ); précédent : 001A34; suivant : 001A36Integration of auditory and somatosensory error signals in the neural control of speech movements
Auteurs : Yongqiang Feng [République populaire de Chine] ; Vincent L. Gracco [Canada, États-Unis] ; Ludo Max [États-Unis]Source :
- Journal of Neurophysiology [ 0022-3077 ] ; 2011.
Abstract
We investigated auditory and somatosensory feedback contributions to the neural control of speech. In
Url:
DOI: 10.1152/jn.00638.2010
PubMed: 21562187
PubMed Central: 3154803
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Vincent L. Gracco<affiliation><nlm:aff wicri:cut=" and" id="aff2">Centre for Research on Brain, Language, and Music</nlm:aff>
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<affiliation wicri:level="4"><nlm:aff id="aff3">School of Communication Sciences and Disorders, McGill University, Montreal, Quebec, Canada;</nlm:aff>
<country xml:lang="fr">Canada</country>
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<orgName type="university">Université McGill</orgName>
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<affiliation wicri:level="2"><nlm:aff id="aff5">Haskins Laboratories, New Haven, Connecticut</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Connecticut</region>
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<wicri:cityArea>Haskins Laboratories, New Haven</wicri:cityArea>
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<front><div type="abstract" xml:lang="en"><p>We investigated auditory and somatosensory feedback contributions to the neural control of speech. In <italic>task I</italic>
, sensorimotor adaptation was studied by perturbing one of these sensory modalities or both modalities simultaneously. The first formant (F1) frequency in the auditory feedback was shifted up by a real-time processor and/or the extent of jaw opening was increased or decreased with a force field applied by a robotic device. All eight subjects lowered F1 to compensate for the up-shifted F1 in the feedback signal regardless of whether or not the jaw was perturbed. Adaptive changes in subjects' acoustic output resulted from adjustments in articulatory movements of the jaw or tongue. Adaptation in jaw opening extent in response to the mechanical perturbation occurred only when no auditory feedback perturbation was applied or when the direction of adaptation to the force was compatible with the direction of adaptation to a simultaneous acoustic perturbation. In <italic>tasks II</italic>
and <italic>III</italic>
, subjects' auditory and somatosensory precision and accuracy were estimated. Correlation analyses showed that the relationships <italic>1</italic>
) between F1 adaptation extent and auditory acuity for F1 and <italic>2</italic>
) between jaw position adaptation extent and somatosensory acuity for jaw position were weak and statistically not significant. Taken together, the combined findings from this work suggest that, in speech production, sensorimotor adaptation updates the underlying control mechanisms in such a way that the planning of vowel-related articulatory movements takes into account a complex integration of error signals from previous trials but likely with a dominant role for the auditory modality.</p>
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