Recruitment patterns of motor units in speech production.
Recruitment patterns of motor units in speech production.
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言语产生中运动单位的募集模式。
DOI：
10.1044/jshr.2404.567
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
Abbas,PJ
中科院分区：
文献类型：
--
作者：
Smith,A;Zimmermann,GN;Abbas,PJ
单个运动单元用肌内电极记录在选择的位置，以分离两个人类受试者的精神肌单元。分析了三组运动单元在音节重复过程中的恢复顺序。在每一组中，运动单元在重复的话语中表现出不同的招募模式。这些唇运动单元的招募模式和Sussman等人在颚开口肌肉中观察到的模式被用来说明对言语活动中运动单元的招募模式的解释至关重要的问题。从现有的数据，不能推断运动单元的大小；然而，招聘模式的可变性对招聘潜在机制的假设具有重要意义。讨论包括从动作电位振幅推断出的运动单元的大小问题，言语实验和通常用来解释这些实验的方法之间的差异，以及在多大程度上可能从面部肌肉的肌电图中分离出单个肌肉的运动单元。
Single motor units were recorded with intramuscular electrodes in sites selected to isolate units of the mentalis muscles of two human subjects. Order of recruitment of three groups of motor units was analyzed during repetition of syllables. Within each group motor units showed variable patterns of recruitment over repeated utterances. These recruitment patterns of labial motor units and the patterns observed by Sussman et al. in a jaw opening muscle are used to illustrate issues critical to interpretation of recruitment patterns of motor units active during speech. From extant data, inferences about the size of the motor units active cannot be made; however, the variability of recruitment patterns has significance for hypotheses about the underlying mechanisms of recruitment. Discussion includes the question of the size of motor units as inferred from action potential amplitude, differences in methodology between experiments in speech and those often used to interpret them, and the extent to which it is possible to isolate motor units from a single muscle in electromyography of facial muscles.