Spatiotemporal coupling between speech and manual motor actions
Identifieur interne : 000154 ( Ncbi/Checkpoint ); précédent : 000153; suivant : 000155Spatiotemporal coupling between speech and manual motor actions
Auteurs : Benjamin Parrell [États-Unis] ; Louis Goldstein [États-Unis] ; Sungbok Lee [États-Unis] ; Dani Byrd [États-Unis]Source :
- Journal of phonetics [ 0095-4470 ] ; 2014.
Abstract
Much evidence has been found for pervasive links between the manual and speech motor systems, including evidence from infant development, deictic pointing, and repetitive tapping and speaking tasks. We expand on the last of these paradigms to look at intra- and cross-modal effects of emphatic stress, as well as the effects of coordination in the absence of explicit rhythm. In this study, subjects repeatedly tapped their finger and synchronously repeated a single spoken syllable. On each trial, subjects placed an emphatic stress on one finger tap or one spoken syllable. Results show that both movement duration and magnitude are affected by emphatic stress regardless of whether that stress is in the same domain (e.g., effects on the oral articulators when a spoken repetition is stressed) or across domains (e.g., effects on the oral articulators when a tap is stressed). Though the size of the effects differs between intra-and cross-domain emphases, the implementation of stress affects both motor domains, indicating a tight connection. This close coupling is seen even in the absence of stress, though it is highlighted under stress. The results of this study support the idea that implementation of prosody is not domain-specific but relies on general aspects of the motor system.
Url:
DOI: 10.1016/j.wocn.2013.11.002
PubMed: 24465063
PubMed Central: 3900246
Affiliations:
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<front><div type="abstract" xml:lang="en"><p id="P1">Much evidence has been found for pervasive links between the manual and speech motor systems, including evidence from infant development, deictic pointing, and repetitive tapping and speaking tasks. We expand on the last of these paradigms to look at intra- and cross-modal effects of emphatic stress, as well as the effects of coordination in the absence of explicit rhythm. In this study, subjects repeatedly tapped their finger and synchronously repeated a single spoken syllable. On each trial, subjects placed an emphatic stress on one finger tap or one spoken syllable. Results show that both movement duration and magnitude are affected by emphatic stress regardless of whether that stress is in the same domain (e.g., effects on the oral articulators when a spoken repetition is stressed) or across domains (e.g., effects on the oral articulators when a tap is stressed). Though the size of the effects differs between intra-and cross-domain emphases, the implementation of stress affects both motor domains, indicating a tight connection. This close coupling is seen even in the absence of stress, though it is highlighted under stress. The results of this study support the idea that implementation of prosody is not domain-specific but relies on general aspects of the motor system.</p>
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