Ackermann H, Ziegler W
Department of Neurology, University of Tübingen, Germany.
J Neurol Neurosurg Psychiatry. 1991 Dec;54(12):1093-8. doi: 10.1136/jnnp.54.12.1093.
Twelve patients with idiopathic Parkinson's disease had acoustic speech analysis of sentence utterances to provide information on speech tempo and accuracy of articulation. As a measure of rate of speech the duration of opening-closing movements during articulation was determined from speech wave variables. The intensity of sound emission during articulatory closure as required for stop consonant production, for example, magnitude of p, magnitude of t, magnitude of k, was used as an index of the degree of closure. Speech tempo was not significantly different from normal. The patients, however, had a reduced capacity of completing articulatory occlusion. This was interpreted as reflecting a reduction in movement amplitude of the articulators. Articulatory "undershoot" was not uniform but influenced by linguistic demands in that the closures associated with a stressed syllable were performed at the expense of unstressed ones. Furthermore, switching between opening and closing movements of the articulators in sentence production seemed undisturbed. These results indicate that motor planning of speech differs from arm movement control.
对12名特发性帕金森病患者的句子发音进行声学语音分析，以获取有关语速和发音准确性的信息。作为语速的一种衡量指标，发音过程中开合运动的持续时间由语音波变量确定。例如，发塞音时发音闭合过程中的发声强度，如p、t、k的强度，被用作闭合程度的指标。患者的语速与正常人无显著差异。然而，患者完成发音闭塞的能力有所下降。这被解释为反映了发音器官运动幅度的减小。发音“未达目标”并不一致，而是受语言要求的影响，即与重读音节相关的闭合动作是以非重读音节为代价进行的。此外，在句子生成过程中发音器官开合运动之间的转换似乎未受干扰。这些结果表明，言语的运动计划与手臂运动控制不同。
