The equilibrium point hypothesis and its application to speech motor control.

The equilibrium point hypothesis and its application to speech motor control.
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平衡点假设及其在言语运动控制中的应用。

DOI:
10.1044/jshr.3902.365
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发表时间:
1996
期刊:
Journal of speech and hearing research
影响因子:
--
通讯作者:
Laboissière,R
Laboissière,R
中科院分区:
--
文献类型:
--
作者:
Perrier,P;Ostry,DJ;Laboissière,R

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在本文中,我们解决了一些问题,在言语研究的背景下,平衡点假说的运动控制。这一假说认为,运动是由于肢体或发音架的平衡位置发生了变化。这种平衡是中枢神经指令、反射机制、肌肉特性和外部负荷相互作用的结果,但它是在中枢神经指令的控制下。这些命令通过作用于运动神经元(MN)池水平的中央指定信号来改变平衡。在矢状面颌骨和舌骨运动的模型的基础上的λ版本的平衡点假设的背景下,我们认为这一假设的发音目标的概念的影响。我们认为,简单的线性控制信号可能是平滑的发音轨迹的基础。我们还探讨了下颌运动中的牙合架内协同发音现象。我们认为,即使没有考虑即将到来的背景下,运动幅度和持续时间的明显预期变化可能会出现由于动态。我们还提出了一些模拟,显示在不同的方式如何在测量的运动学的变化,尽管恒定幅度的语音控制信号可能会出现。
In this paper, we address a number of issues in speech research in the context of the equilibrium point hypothesis of motor control. The hypothesis suggests that movements arise from shifts in the equilibrium position of the limb or the speech articulator. The equilibrium is a consequence of the interaction of central neural commands, reflex mechanisms, muscle properties, and external loads, but it is under the control of central neural commands. These commands act to shift the equilibrium via centrally specified signals acting at the level of the motoneurone (MN) pool. In the context of a model of sagittal plane jaw and hyoid motion based on the λ version of the equilibrium point hypothesis, we consider the implications of this hypothesis for the notion of articulatory targets. We suggest that simple linear control signals may underlie smooth articulatory trajectories. We explore as well the phenomenon of intra-articulator coarticulation in jaw movement. We suggest that even when no account is taken of upcoming context, that apparent anticipatory changes in movement amplitude and duration may arise due to dynamics. We also present a number of simulations that show in different ways how variability in measured kinematics can arise in spite of constant magnitude speech control signals.
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发表时间: 1990
期刊: Advances in psychology
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发表时间: 1971
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期刊: CRITICAL REVIEWS IN ORAL BIOLOGY & MEDICINE
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