دانلود مقاله ISI انگلیسی شماره 70151
عنوان فارسی مقاله

شرایط کار دوگانه بازده مکانیسم توجه انتخابی در بیماری آلزایمر را تعدیل می کند

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70151 2010 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Dual-task conditions modulate the efficiency of selective attention mechanisms in Alzheimer's disease
منبع

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

Journal : Neuropsychologia, Volume 48, Issue 11, September 2010, Pages 3252–3261

کلمات کلیدی
توجه تقسیم؛ زوال عقل؛ کنترل اجرایی؛ موقعیت یابی مکانی؛ جستجوی بصری؛ تداخل واکنش
پیش نمایش مقاله
پیش نمایش مقاله شرایط کار دوگانه بازده مکانیسم توجه انتخابی در بیماری آلزایمر را تعدیل می کند

چکیده انگلیسی

Given previous demonstrations of both selective and divided attention deficits in Alzheimer's disease (AD) patients, understanding how declines in the integrity of component processes of selective attention in these patients interact with impairments to executive processes mediating dual-task performance has both theoretical and practical relevance. To address this issue, healthy elderly and AD patients performed computerized tasks of spatial orienting, Simon response interference, and visual search both in isolation and while simultaneously engaged in a visuomotor tracking task (i.e., maintaining car position within a simulated driving environment). Results from the single-task conditions confirmed previous demonstrations of selective attention deficits in AD. Dual-task conditions produced in AD patients (but not healthy elderly) a change in the efficiency of the selective attention mechanisms themselves, as reflected in differential effects on cue or display conditions within each task. Rather than exacerbating the selective attention deficits observed under single-task conditions, however, dual-task conditions produced an apparent diminution of these deficits. We suggest this diminution is due to the combination of deficient top-down inhibitory processes along with a decrease in the attention-capturing properties of cue information under dual-task conditions in AD patients. These findings not only increase our understanding of the nature of the attentional deficits in AD patients, but also have implications for understanding the processes mediating attention in neurologically intact individuals.

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