دانلود مقاله ISI انگلیسی شماره 77231
عنوان فارسی مقاله

اثر فروپاشی حافظه فضایی و دخالت دو کار بر روی واکنش های آشفتگی و برانگیخته شده دسترسی به درک در غیاب بازخورد بصری آنلاین

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
77231 2013 15 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Effects of spatial-memory decay and dual-task interference on perturbation-evoked reach-to-grasp reactions in the absence of online visual feedback
منبع

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

Journal : Human Movement Science, Volume 32, Issue 2, April 2013, Pages 328–342

کلمات کلیدی
حرکات بازو؛ ثبات وضعیتی، واکنش باعث شده - تداخل دو کار؛ حافظه کاری فضایی
پیش نمایش مقاله
پیش نمایش مقاله اثر فروپاشی حافظه فضایی و دخالت دو کار بر روی واکنش های آشفتگی و برانگیخته شده دسترسی به درک در غیاب بازخورد بصری آنلاین

چکیده انگلیسی

Recent findings suggest that rapid perturbation-evoked reach-to-grasp balance-recovery reactions can be (and often are) guided by visuospatial information stored in working memory. To further our understanding, the present study examined the influence of memory-decay and concurrent cognitive-task performance on the speed, accuracy and effectiveness of these reactions by using liquid-crystal goggles to initiate occlusion of vision at various “recall-delay” times prior to perturbation-onset, in ten healthy young-adults. A small handhold was moved unpredictably to one of four locations 2 s prior to vision-occlusion; reactions to recover balance by grasping the handhold were evoked by unpredictable antero-posterior platform-translation perturbations. Recall-delay time (0 s/2 s/5 s/10 s) was randomized, and subjects performed a spatial- or non-spatial-memory task during the delay-time in a subset of trials. Consistent with studies of volitional reach-to-grasp, recall-delay led to some reduction in endpoint accuracy; however, unlike those studies, the present results showed no evidence that recall-delay led to slowing of the arm movement. Both spatial and non-spatial cognitive tasks had similar effects (slowing of movement initiation and execution), suggesting these effects were related to generic attentional demands rather than competition for specific resources related to spatial working memory. Further work is needed to determine effects of age-related impairments in visuospatial memory and attentional capacity.

خرید مقاله
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