The role of executive control in bilingual language production: A study with Parkinson's disease individuals
The role of executive control in bilingual language production: A study with Parkinson's disease individuals
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DOI：
10.1016/j.neuropsychologia.2014.11.006
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发表时间：
2015-01-01
期刊：
影响因子：
2.6
通讯作者：
Costa, Albert
中科院分区：
文献类型：
--
作者：
Cattaneo, Gabriele;Calabria, Marco;Costa, Albert
基底神经节在语言控制（LC）过程中起着至关重要的作用，允许双语者正确地说出一种语言，而不受非请求语言的干扰。它已被假设，LC的神经机制非常类似于域一般执行控制（EC）。本研究的目的是调查双语LC的完整性和它的重叠与域一般EC在临床人群中，如帕金森氏病（PD），臭名昭著的与基底神经节的结构损伤相关的个人。首先，我们采用了语言转换任务，调查LC的完整性在一组加泰罗尼亚语-西班牙语双语个人与PD相比，一组匹配的健康对照。其次，为了检验一般领域EC和LC之间的关系，我们比较了PD和健康对照者在非语言转换任务中的表现。我们强调，与对照组相比，个人与PD报告降低处理速度，准确性和更大的切换成本RT和错误的语言切换任务，而在非语言切换任务PD患者只增加切换成本的错误。然而，我们报告的语言和非语言的混合成本在个人与PD的幅度之间呈正相关。两者合计，这些结果支持的概念，在LC的基底神经节和连接结构的关键作用，并建议LC和域一般EC之间的可能联系。(C)2014爱思唯尔有限公司版权所有。
The basal ganglia are critically involved in language control (LC) processes, allowing a bilingual to utter correctly in one language without interference from the non-requested language. It has been hypothesized that the neural mechanism of LC closely resembles domain-general executive control (EC). The purpose of the present study is to investigate the integrity of bilingual LC and its overlap with domain-general EC in a clinical population such as individuals with Parkinson's disease (PD), notoriously associated with structural damage in the basal ganglia.We approach these issues in two ways. First, we employed a language switching task to investigate the integrity of LC in a group of Catalan-Spanish bilingual individuals with PD, as compared to a group of matched healthy controls. Second, to test the relationship between domain-general EC and LC we compared the performances of individuals with PD and healthy controls also in a non-linguistic switching task. We highlight that, compared to controls, individuals with PD report decreased processing speed, less accuracy and larger switching costs in terms of RT and errors in the language switching task, whereas in the non-linguistic switching task PD patients showed only increased switching cost in terms of errors. However, we report a positive correlation between the magnitudes of linguistic and non-linguistic mixing costs in individuals with PD. Taken together, these results support the notion of a critical role of the basal ganglia and connected structures in LC, and suggest a possible link between LC and domain-general EC. (C) 2014 Elsevier Ltd. All rights reserved.