Kinematic and electromyographic responses to perturbation of the jaw.
Kinematic and electromyographic responses to perturbation of the jaw.
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DOI：
10.1121/1.398223
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发表时间：
1989-07
期刊：
影响因子：
--
通讯作者：
Susan Shaiman
中科院分区：
文献类型：
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作者：
Susan Shaiman
本文采用扰动范式研究了言语产生过程中感觉运动机制的任务依赖性组织。6名受试者在[aedae]舌抬高（嘴唇不参与）和[aedae]双唇闭合（舌头不参与）之前和期间接受了非预期的下颌扰动。应变仪系统用于监测上唇、下唇和下颌的上前移位，而钩丝电极监测嘴唇、下颌和舌头的各种肌肉的肌肉活动。结果表明，在[aedae]期间，对嘴唇和/或下颌的下颌扰动进行了显著的补偿运动学调整，但在[aedae]期间没有唇补偿（一名受试者除外）。EMG反应不一致，不一定表明运动学的结果。个体受试者对扰动的反应可靠但不同，使用不同的相关发音器组合来实现双唇闭合和舌-牙槽接触。目前的研究支持早期的研究表明，运动系统的组件是灵活组装的，根据具体任务的要求。也就是说，对感觉信息的补偿性反应只有在功能上必要时才会发生。
The task-dependent organization of sensorimotor mechanisms during the production of speech was investigated using a perturbation paradigm. Six subjects received unanticipated jaw perturbations before and during tongue elevation for [aedae], in which the lips do not participate, and bilabial closure for [aebae], in which the tongue does not participate. A strain gauge system was used to monitor inferior-superior displacements of the upper lip, lower lip, and jaw, while hooked-wire electrodes monitored muscle activity in various muscles of the lips, jaw, and tongue. Results indicated significant compensatory kinematic adjustments to jaw perturbations in the lips and/or jaw during [aebae], but no labial compensations during [aedae] (with the exception of one subject). EMG responses were inconsistent and not necessarily indicative of the kinematic findings. Individual subjects responded to perturbations reliably but differently, using different combinations of involved articulators to achieve bilabial closure and lingua-alveolar contact. The current study supports earlier research which suggests that the components of the motor system are flexibly assembled, based on the requirements of the specific task. That is, compensatory responses to sensory information occur only when such responses are functionally necessary.