Deficits on irregular verbal morphology in Italian-speaking Alzheimer's disease patients.
Deficits on irregular verbal morphology in Italian-speaking Alzheimer's disease patients.
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意大利语阿尔茨海默病患者言语形态不规则的缺陷。
DOI：
10.1016/j.neuropsychologia.2008.12.038
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发表时间：
2009
期刊：
影响因子：
2.6
通讯作者：
Ullman,MichaelT
中科院分区：
文献类型：
--
作者：
Walenski,Matthew;Sosta,Katiuscia;Cappa,Stefano;Ullman,MichaelT
对英语的研究表明，颞叶患者，包括阿尔茨海默病患者，在处理真实的和新的规则屈折形式（例如，walk→walked; blick→blicked），但在真实的和新的不规则形式上受损（例如，dig→ dig; spling→splang）。在这里，我们扩展跨语言的调查更复杂的系统，意大利语的动词形态，使我们能够探讨以前的研究结果在英语中的一般性，以及测试不同的解释帐户的屈折形态。我们研究了由母语为意大利语的健康对照受试者和可能患有阿尔茨海默病的患者产生的真实的和新颖的规则和不规则的过去分词和现在时形式。与对照组相比，患者在变形真实的不规则动词，但没有真实的规则动词的过去分词和现在时形式，但没有受损的真实的规则动词的过去分词或现在时形式。对于新的过去分词，患者表现出同样的模式，受损的生产II类（不规则）的形式，但幸免于I类（规则）的生产。在现在时态中，患者在产生II类形式（在现在时态中是规则的）时受损，但在产生I类（规则）形式时幸免。与在英语中观察到的模式相反，患者对不规则者所犯的错误并没有显示出规则化错误的优势（例如，挖→挖）。因此，这些发现部分复制了之前英语的发现，但也揭示了一种具有更复杂形态系统的语言的新模式，其中包括动词类（英语中无法测试）。在英语以外的语言中颞叶损伤后出现不规则缺陷的证明揭示了基本效应的跨语言普遍性，同时也阐明了规则和不规则形态形式的神经认知基础的重要语言特异性差异。
Studies of English have shown that temporal-lobe patients, including those with Alzheimer's disease, are spared at processing real and novel regular inflected forms (e.g., walk→walked; blick→blicked), but impaired at real and novel irregular forms (e.g., dig→dug; spling→splang). Here we extend the investigation cross-linguistically to the more complex system of Italian verbal morphology, allowing us to probe the generality of the previous findings in English, as well as to test different explanatory accounts of inflectional morphology. We examined the production of real and novel regular and irregular past-participle and present-tense forms by native Italian-speaking healthy control subjects and patients with probable Alzheimer's disease. Compared to the controls, the patients were impaired at inflecting real irregular verbs but not real regular verbs both for past-participle and present-tense forms, but were not impaired at real regular verbs either for past-participle or present-tense forms. For novel past participles, the patients exhibited this same pattern of impaired production of class II (irregular) forms but spared class I (regular) production. In the present-tense, patients were impaired at the production of class II forms (which are regular in the present-tense), but spared at production of class I (regular) forms. Contrary to the pattern observed in English, the errors made by the patients on irregulars did not reveal a predominance of regularization errors (e.g., dig→digged). The findings thus partly replicate prior findings from English, but also reveal new patterns from a language with a more complex morphological system that includes verb classes (which are not possible to test in English). The demonstration of an irregular deficit following temporal-lobe damage in a language other than English reveals the cross-linguistic generality of the basic effect, while also elucidating important language-specific differences in the neurocognitive basis of regular and irregular morphological forms.