کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
911782 1473171 2015 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interference from object part relations in spoken word production: Behavioural and fMRI evidence
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
پیش نمایش صفحه اول مقاله
Interference from object part relations in spoken word production: Behavioural and fMRI evidence
چکیده انگلیسی


• We test object-part relations in blocked cyclic naming.
• Two experiments are performed using behavioural and neuroimaging methods.
• Homogeneous contexts slow picture naming compared to heterogeneous contexts.
• Neural activity was observed in the hippocampus and dorsolateral prefrontal cortex.
• We suggest the involvement of working memory mechanisms in blocked cyclic naming.

Objects presented in categorically related contexts are typically named slower than objects presented in unrelated contexts, a phenomenon termed semantic interference. However, not all semantic relationships induce interference. In the present study, we investigated the influence of object part-relations in the blocked cyclic naming paradigm. In Experiment 1 we established that an object's parts do induce a semantic interference effect when named in context compared to unrelated parts (e.g., leaf, root, nut, bark; for tree). In Experiment 2) we replicated the effect during perfusion functional magnetic resonance imaging (fMRI) to identify the cerebral regions involved. The interference effect was associated with significant perfusion signal increases in the hippocampal formation and decreases in the dorsolateral prefrontal cortex. We failed to observe significant perfusion signal changes in the left lateral temporal lobe, a region that shows reliable activity for interference effects induced by categorical relations in the same paradigm and is proposed to mediate lexical-semantic processing. We interpret these results as supporting recent explanations of semantic interference in blocked cyclic naming that implicate working memory mechanisms. However, given the failure to observe significant perfusion signal changes in the left temporal lobe, the results provide only partial support for accounts that assume semantic interference in this paradigm arises solely due to lexical-level processes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Neurolinguistics - Volume 36, November 2015, Pages 56–71
نویسندگان
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