Zimmermann G N, Hanley J M
J Speech Hear Res. 1983 Mar;26(1):35-42. doi: 10.1044/jshr.2601.35.
Cinefluorography was used to study three stutterers and two nonstutterers repeating a passage made up of monosyllables. CVC target words of the form/caet/ were embedded in the passage and were analyzed to determine the effects of repeating the passage on velocities, displacements, and durations of movements of the tongue, jaw, and lower lip. Coordination among the articulators was also assessed. The investigation was undertaken to test the hypothesis that decreases in velocities and displacements, increased movement durations, and decreased latency between the onsets of jaw movements and of tongue tip movements would be associated with the repeated readings. The hypothesis was not supported by the results. A post hoc analysis showed that a decrease in the variability of instantaneous velocities (and by inference a decrease in variation in muscle stiffness) was associated with practice for the three stutterers but not for the nonstutterers. Inferences about the adaptation effect are made related (a) to the stabilization of tonic muscle activity which may be associated with a decrease in arousal, and (b) to the effects of practice.
采用电影荧光描记法对三名口吃者和两名非口吃者重复由单音节组成的段落的情况进行了研究。形式为/caet/的CVC目标词被嵌入到段落中，并对其进行分析，以确定重复段落对舌头、下颌和下唇运动的速度、位移和持续时间的影响。还评估了发音器官之间的协调性。进行这项调查是为了检验以下假设：重复阅读会导致速度和位移降低、运动持续时间增加以及下颌运动起始与舌尖运动起始之间的延迟减少。结果不支持该假设。事后分析表明，三名口吃者的瞬时速度变异性降低（由此推断肌肉僵硬度变化减小）与练习有关，而非口吃者则不然。关于适应效果的推断与以下两方面有关：(a) 可能与唤醒水平降低相关的紧张性肌肉活动的稳定，以及 (b) 练习的效果。
