دانلود مقاله ISI انگلیسی شماره 70896
عنوان فارسی مقاله

مناطق مغز مربوط به حافظه آینده نگر که توسط توموگرافی تابش پوزیترون تعیین شده است

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70896 2001 11 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Brain regions involved in prospective memory as determined by positron emission tomography
منبع

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

Journal : Neuropsychologia, Volume 39, Issue 6, 2001, Pages 545–555

کلمات کلیدی
لوب پیشانی؛ قصد؛ اجرایی؛ توموگرافی گسیل پوزیترون؛ تصویربرداری عملکردی
پیش نمایش مقاله
پیش نمایش مقاله مناطق مغز مربوط به حافظه آینده نگر که توسط توموگرافی تابش پوزیترون تعیین شده است

چکیده انگلیسی

Prospective memory (PM) refers to the functions that enables a person to carry out an intended act after a delay. Despite the ubiquity of this behaviour, little is known about the supporting brain structures and the roles that they play. In this study, eight healthy participants performed four different PM tasks, each under three conditions: a baseline, and two conditions involving an intention. In the first of the intention conditions, subjects were asked to make a novel response to a certain class of stimuli whilst performing an attention-demanding task. However, the expected stimuli never actually occurred. In the second intention condition subjects were expecting to see these stimuli as before, and they did occur on ≈20% of trials. Relative to the baseline condition, increases in regional cerebral blood flow (rCBF) as estimated by oxygen-15 positron emission tomography technique across all four tasks were seen in the frontal pole (Brodmann's area 10) bilaterally, right lateral prefrontal and inferior parietal regions plus the precuneus when subjects were expecting a PM stimulus regardless of whether it actually occurred. Further activation was seen in the thalamus when the PM stimuli occurred and was acted upon, with a corresponding rCBF decrease in right lateral prefrontal cortex. It is argued that the first set of region play a role in the maintenance of an intention, with the second set involved additionally in its realisation.

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