Ackermann H, Hertrich I
Department of Neurology, University of Tübingen, Germany.
Brain Lang. 1997 Feb 15;56(3):321-33. doi: 10.1006/brln.1997.1740.
In eight patients with a purely ataxic syndrome due to cerebellar atrophy the voice onset time (VOT) of word-initial stop consonants was measured at the acoustic signal. The subjects had been asked to produce sentence utterances including either one of the German minimal pair cognates "Daten" (/daten/, "data") and "Taten" (/taten/, "deeds"). In addition, a master tape comprising the target words from patients and controls in randomized order was played to six listeners for perceptual evaluation. Two major findings emerged. First, the cerebellar subjects presented with a reduced categorical distinction of the VOT of voiced and unvoiced stop consonants. Second, the patients' target words with initial unvoiced plosive gave rise to a significantly increased number of misassignments at perceptual evaluation. To some extent comparable VOT disruptions have been noted in apraxia of speech and basal ganglia disorders. Thus, different pathomechanisms might result in similar VOT abnormalities.
在八名因小脑萎缩导致单纯共济失调综合征的患者中，通过声学信号测量了单词起始塞音的语音起始时间（VOT）。受试者被要求说出包含德语最小对同源词“Daten”（/daten/，“数据”）和“Taten”（/taten/，“行为”）之一的句子。此外，将一盘包含患者和对照者目标单词的主磁带以随机顺序播放给六名听众进行感知评估。出现了两个主要发现。首先，小脑病变受试者对浊音和清音塞音的VOT分类区分减少。其次，患者以清音爆破音开头的目标单词在感知评估中导致错误分配的数量显著增加。在言语失用症和基底神经节疾病中也注意到了在某种程度上类似的VOT破坏。因此，不同的病理机制可能导致类似的VOT异常。
