Auditory plasticity and speech motor learning
Auditory plasticity and speech motor learning
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DOI：
10.1073/pnas.0907032106
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发表时间：
2009-12-01
影响因子：
11.1
通讯作者：
Ostry, David J.
中科院分区：
文献类型：
--
作者：
Nasir, Sazzad M.;Ostry, David J.
感觉系统和运动系统的可塑性有联系吗？在这里，在语音运动学习和感知的背景下，我们测试的想法感官功能修改运动学习，特别是，语音运动学习影响扬声器的听觉地图。我们通过使用一个机器人装置来评估言语运动的学习，该装置在言语过程中移动下颌并选择性地改变体感反馈。我们发现，随着实践扬声器逐步纠正机械扰动和运动学习后，他们也表现出系统的变化，在他们的语音感知分类。感知的转变与运动学习有关。表现出更大学习量的个体也表现出更大的感知变化。在产生相同运动的对照受试者中没有观察到感知变化，但在没有力场的情况下，也没有在经历力场但未能适应机械负荷的受试者中观察到感知变化。这里观察到的感知效果表明，参与的躯体感觉系统的神经处理的语音声音，并建议，言语运动学习的结果在听觉感知功能的变化。
Is plasticity in sensory and motor systems linked? Here, in the context of speech motor learning and perception, we test the idea sensory function is modified by motor learning and, in particular, that speech motor learning affects a speaker's auditory map. We assessed speech motor learning by using a robotic device that displaced the jaw and selectively altered somatosensory feedback during speech. We found that with practice speakers progressively corrected for the mechanical perturbation and after motor learning they also showed systematic changes in their perceptual classification of speech sounds. The perceptual shift was tied to motor learning. Individuals that displayed greater amounts of learning also showed greater perceptual change. Perceptual change was not observed in control subjects that produced the same movements, but in the absence of a force field, nor in subjects that experienced the force field but failed to adapt to the mechanical load. The perceptual effects observed here indicate the involvement of the somatosensory system in the neural processing of speech sounds and suggest that speech motor learning results in changes to auditory perceptual function.