دانلود مقاله ISI انگلیسی شماره 60893
عنوان فارسی مقاله

از ذخیره سازی تا دستکاری: چگونه ارتباطات عصبی حافظه کاری کلامی منعکس کننده خواسته های مختلف در گفتار درونی است

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
60893 2012 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
From storage to manipulation: How the neural correlates of verbal working memory reflect varying demands on inner speech
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Brain and Language, Volume 120, Issue 1, January 2012, Pages 42–51

کلمات کلیدی
حافظه کاری؛ سخنرانی؛ استرنبرگ؛ fMRI؛ حلقه آواشناسی؛ مخچه؛ نما؛ جداری؛ عایق
پیش نمایش مقاله
پیش نمایش مقاله از ذخیره سازی تا دستکاری: چگونه ارتباطات عصبی حافظه کاری کلامی منعکس کننده خواسته های مختلف در گفتار درونی است

چکیده انگلیسی

The ability to store and manipulate online information may be enhanced by an inner speech mechanism that draws upon motor brain regions. Neural correlates of this mechanism were examined using event-related functional magnetic resonance imaging (fMRI). Sixteen participants completed two conditions of a verbal working memory task. In both conditions, participants viewed one or two target letters. In the “storage” condition, these targets were held in mind across a delay. Then a probe letter was presented, and participants indicated by button press whether the probe matched the targets. In the “manipulation” condition, participants identified new targets by thinking two alphabetical letters forward of each original target (e.g., f → h). Participants subsequently indicated whether the probe matched the newly derived targets. Brain activity during the storage and manipulation conditions was examined specifically during the delay phase in order to directly compare manipulation versus storage processes. Activations that were common to both conditions, yet disproportionately greater with manipulation, were observed in the left inferior frontal cortex, premotor cortex, and anterior insula, bilaterally in the parietal lobes and superior cerebellum, and in the right inferior cerebellum. This network shares substrates with overt speech and may represent an inner speech pathway that increases activity with greater working memory demands. Additionally, an inverse correlation was observed between manipulation-related brain activity (on correct trials) and test accuracy in the left premotor cortex, anterior insula, and bilateral superior cerebellum. This inverse relationship may represent intensification of inner speech as one struggles to maintain performance levels.

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