Spencer Kristie A, Dawson Mallory
Department of Speech and Hearing Sciences, University of Washington, Seattle.
Am J Speech Lang Pathol. 2019 Jul 15;28(2S):915-924. doi: 10.1044/2018_AJSLP-MSC18-18-0114.
Purpose This preliminary study examined whether speech profiles exist for adults with hereditary ataxia based on 2 competing frameworks: a pattern of instability/inflexibility or a pattern of differential subsystem involvement. Method Four dysarthria experts rated the speech samples of 8 adults with dysarthria from hereditary ataxia using visual analog scales and presence/severity rating scales of speech characteristics. Speaking tasks included diadochokinetics, sustained phonation, and a monologue. Results Speech profiles aligned with the instability/inflexibility framework, with the pattern of instability being the most common. Speech profiles did not emerge for the majority of speakers using the differential subsystem framework. Conclusions The findings extend previous research on pure ataxic dysarthria and suggest a possible framework for understanding the speech heterogeneity associated with the ataxias. The predominance of the instability profile is consistent with the notion of impaired feedforward control in speakers with cerebellar disruption.
目的 本初步研究基于两个相互竞争的框架，探讨患有遗传性共济失调的成年人是否存在言语特征：不稳定/不灵活模式或不同子系统受累模式。方法 4名言语障碍专家使用视觉模拟量表以及言语特征的存在/严重程度评定量表，对8名患有遗传性共济失调所致言语障碍的成年人的言语样本进行评分。言语任务包括轮替运动、持续发声和一段独白。结果 言语特征与不稳定/不灵活框架相符，其中不稳定模式最为常见。使用不同子系统框架时，大多数受试者并未呈现出言语特征。结论 这些发现扩展了先前关于单纯共济失调性构音障碍的研究，并提出了一个可能的框架，用于理解与共济失调相关的言语异质性。不稳定特征的 predominance 与小脑功能受损的受试者前馈控制受损的概念一致。 （注：“predominance”原文拼写有误，可能是“predominance”，这里按推测翻译为“优势”）
