Auditory startle disrupts speech coordination
Speech production requires temporal coordination between the actions of different functional groupings of muscles in the human body. Crucially, such functionally organized units, or “modules”, may be susceptible to disruption by an external stimulus such as a startling auditory stimulus (SAS; >120dB), enabling a possible window into the internal structure of learned speech movements. Following on the observation that SAS is known to accelerate the release of pre-planned actions, the current study examines lip kinematics in SAS-induced responses during speech movements to test whether this accelerated release applies on the scale of entire syllables or on the scale of smaller functional units. Production measures show that SAS-elicited bilabial movements in [ba] syllables are prone to disruption as measured by discontinuity in velocity profiles. We use a 3D finite element method (FEM) biomechanical model to simulate the temporal interaction between muscle groupings in speech. Simulation results indicate that this discontinuity can be accounted for as an instance of temporally decoupled coordination across neuromuscular modules. In such instances, the muscle groupings controlling lip compression and jaw opening, which normally fire sequentially, appear more likely to be activated synchronously.
Keywords: speech modules, speech coordination, temporal decoupling, startle, ArtiSynth
Keywords: 言語模組, 言語協同運動, 時序解耦, 驚嚇刺激, ArtiSynth 模型
Published online: 17 November 2021
Bizzi, Emilio, Matthew C. Tresch, Philippe Saltiel, and Andrea d’Avella
Bizzi, Emilio, and Vincent C. K. Cheung
Brown, P., Rothwell, J. C., Thompson, P. D., Britton, T. C., Day, B. L., and Marsden, C. D.
Carlsen, Anthony N., Dana Maslovat, Melanie Y. Lam, Romeo Chua, and Ian M. Franks
Caruso, Anthony J., James H. Abbs, and Vincent L. Gracco
2015 Startling Auditory Stimulus as a Window into Speech Motor Planning. Doctoral dissertation, University of British Columbia, Vancouver.
Chiu, Chenhao, and Bryan Gick
d’Avella, Andrea, and Emilio Bizzi
d’Avella, Andrea, Martin Giese, Yuri P. Ivanenko, Thomas Schack, and Tamar Flash
Flynn, Cormac, Ian Stavness, John Lloyd, and Sidney Fels
Forgaard, Christopher J., Dana Maslovat, Anthony N. Carlsen, Romeo Chua, and Ian M. Franks
Green, Jordan R., Christopher A. Moore, and Kevin J. Reilly
Green, Jordan R., Christopher A. Moore, Masahiko Higashikawa, and Roger W. Steeve
Lloyd, John E., Ian Stavness, and Sidney Fels
Mayer, Connor, Francois Roewer-Despres, Ian Stavness, and Bryan Gick
McClean, Michael D.
Mussa-Ivaldi, Ferdinando A., Simon F. Giszter, and Emilio Bizzi
Nijhuis, Lars B. Oude, Loes Janssen, Bastiaan R. Bloem, J. Gert van Dijk, Stan C. Gielen, George F. Borm, and Sebastiaan Overeem
Safavynia, Seyed A., and Lena H. Ting
Stavness, Ian, Mohammad Ali Nazari, Pascal Perrier, Didier Demolin, and Yohan Payan
Stevenson, Anderson. J. T., Chenhao Chiu, Dana Maslovat, Romeo Chua, Bryan Gick, Jean-Sebastian Blouin, and Ian M. Franks
Ting, Lena H., Hillel J. Chiel, Randy D. Trumbower, Jessica L. Allen, J. Lukas McKay, Madeleine E. Hackney, and Trisha M. Kesar
Tremblay, Stéphanie, Douglas M. Shiller, and David J. Ostry