دانلود مقاله ISI انگلیسی شماره 38646
عنوان فارسی مقاله

کنترل توجه در مغز سالمندان: دیدگاه مطالعات FMRI از کار استروپ

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
38646 2002 20 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Attentional Control in the Aging Brain: Insights from an fMRI Study of the Stroop Task
منبع

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

Journal : Brain and Cognition, Volume 49, Issue 3, August 2002, Pages 277–296

کلمات کلیدی
کنترل توجه - استروپ - رقابت - جنگ - کمربندی قدامی - قشر بجلو مغز - قشر جداری
پیش نمایش مقاله
پیش نمایش مقاله کنترل توجه در مغز سالمندان: دیدگاه مطالعات FMRI از کار استروپ

چکیده انگلیسی

Abstract Several recent studies of aging and cognition have attributed decreases in the efficiency of working memory processes to possible declines in attentional control, the mechanism(s) by which the brain attempts to limit its processing to that of task-relevant information. Here we used fMRI measures of neural activity during performance of the color–word Stroop task to compare the neural substrates of attentional control in younger (ages: 21–27 years old) and older participants (ages: 60–75 years old) during conditions of both increased competition (incongruent and congruent neutral) and increased conflict (incongruent and congruent neutral). We found evidence of age-related decreases in the responsiveness of structures thought to support attentional control (e.g., dorsolateral prefrontal and parietal cortices), suggesting possible impairments in the implementation of attentional control in older participants. Consistent with this notion, older participants exhibited more extensive activation of ventral visual processing regions (i.e., temporal cortex) and anterior inferior prefrontal cortices, reflecting a decreased ability to inhibit the processing of task-irrelevant information. Also, the anterior cingulate cortex, a region involved in evaluatory processes at the level of response (e.g., detecting potential for error), showed age-related increases in its sensitivity to the presence of competing color information. These findings are discussed in terms of newly emerging models of attentional control in the human brain

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