دانلود مقاله ISI انگلیسی شماره 77580
عنوان فارسی مقاله

تمرین کامل می کند، اما تنها با دست راست: حساسیت به خطای حسی ادراکی با درک بی دست و پا با تمرین دست راست اما نه دست چپ را کاهش می یابد

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
77580 2008 8 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Practice makes perfect, but only with the right hand: Sensitivity to perceptual illusions with awkward grasps decreases with practice in the right but not the left hand
منبع

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

Journal : Neuropsychologia, Volume 46, Issue 2, 2008, Pages 624–631

کلمات کلیدی
عمل؛ درک؛نیمکره چپ ؛ ادراک؛ خطای حسی بصری
پیش نمایش مقاله
پیش نمایش مقاله تمرین کامل می کند، اما تنها با دست راست: حساسیت به خطای حسی ادراکی با درک بی دست و پا با تمرین دست راست اما نه دست چپ را کاهش می یابد

چکیده انگلیسی

It has been proposed that the visual mechanisms that control well-calibrated actions, such as picking up a small object with a precision grip, are neurally distinct from those that mediate our perception of the object. Thus, grip aperture in such situations has been shown to be remarkably insensitive to many size-contrast illusions. But most of us have practiced such movements hundreds, if not thousands of times. What about less familiar and unpracticed movements? Perhaps they would be less likely to be controlled by specialized visuomotor mechanisms and would therefore be more sensitive to size-contrast illusions. To test this idea, we asked right-handed subjects to pick up small objects using either a normal precision grasp (thumb and index finger) or an awkward grasp (thumb and ring finger), in the context of the Ponzo illusion. Even though this size-contrast illusion had no effect on the scaling of the precision grasp, it did have a significant effect on the scaling of the awkward grasp. Nevertheless, after three consecutive days of practice, even the awkward grasp became resistant to the illusion. In a follow-up experiment, we found that awkward grasps with the left hand (in right handers) did not benefit from practice and remained sensitive to the illusion. We conclude that the skilled target-directed movements are controlled by visual mechanisms that are quite distinct from those controlling unskilled movements, and that these specialized visuomotor mechanisms may be lateralized to the left hemisphere.

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