The role of executive control in bilingual language production: A study with Parkinson's disease individuals

NEUROPSYCHOLOGIA

卷:66

Article

Cattaneo, Gabriele¹  Calabria, Marco¹  Marne, Paula¹  Gironell, Alexandre²  Abutalebi, Jubin^3,4  Costa, Albert^1,5 

[1] Univ Pompeu Fabra, Ctr Brain & Cognit, Barcelona 08014, Spain

[2] St Pau Hosp, Dept Neurol, Movement Disorders Unit, Barcelona, Spain

[3] Univ San Raffaele, Milan, Italy

[4] Univ Hong Kong, Div Speech & Hearing Sci, Hong Kong, Hong Kong, Peoples R China

[5] ICREA, Barcelona, Spain

关键词: Bilingualism;    Parkinson's disease;    Executive control;    Bilingual language control;   

DOI  :  10.1016/j.neuropsychologia.2014.11.006

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free