Perioral muscle activity in young and older adults during speech and nonspeech tasks.
Perioral muscle activity in young and older adults during speech and nonspeech tasks.
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年轻人和老年人在言语和非言语任务期间的口周肌肉活动。
DOI：
10.1044/jshr.3904.761
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Wohlert,AB
中科院分区：
文献类型：
--
作者：
Wohlert,AB
肌电图活动在嘴唇周围的配对位点之间的相关性被检查作为口腔运动中肌肉耦合的测量。22名年轻女性（M=22岁）和22名年长女性（M=75岁）完成了突出嘴唇、咀嚼、对话和大声朗读的任务。在任务执行的20秒内，分别记录上下嘴唇左右两侧的表面肌电信号。来自每个部位的信号，代表了底层组织中存在的肌纤维活动的总和，与来自其他部位的信号相关联。正相关是普遍存在的，但值的范围从。96到-。19. 无论任务是什么，上唇和下唇的相关值往往都很高。其他部位（右侧、左侧和对角线对）也与突出和咀嚼任务高度相关，但与言语任务的相关性较低。年轻女性在言语任务中的相关值明显低于年长女性。结果表明，由于衰老过程的影响，语言的肌肉耦合增加，这可能反映了精细口腔运动控制灵活性的降低。讨论了相关技术的局限性和老年人言语生成能力的相关问题。
Correlations of EMG activity among paired sites surrounding the lips were examined as a measure of muscle coupling during oral movements. Twenty-two young women (M=22 years old) and 22 older women (M=75 years old) performed lip protrusion, chewing, conversational speech, and reading aloud tasks. Surface EMG was recorded from the right and left sides of both the upper and lower lips during 20 s of task performance. Signals from each site, representing the sum of activity from muscle fibers present in the underlying tissue, were correlated with signals from every other site. Positive correlations were pervasive, but the range of values extended from .96 to -. 19. Correlation values tended to be high across the upper lip and across the lower lip, regardless of the task. Other sites (right side, left side, and diagonal pairs) were also highly correlated for the protrusion and chewing tasks, but were less highly correlated for the speech tasks. Younger women showed significantly lower correlation values for speech tasks than older women. Results imply an increase in muscle coupling for speech as an effect of the aging process, perhaps reflecting a reduction in flexibility of fine oral motor control. Limits of the correlation technique and issues concerning speech production ability in old age are discussed.