کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5042333 1474383 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Neural activity reveals perceptual grouping in working memory
ترجمه فارسی عنوان
فعالیت عصبی، گروه ادراکی را در حافظه کاری نشان می دهد
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی


- The CDA can index number of locations held in visual-spatial working memory.
- Encoding strategy influences CDA amplitude.
- Perceptual grouping of locations to form a constellation reduces CDA amplitude.

There is extensive evidence that the contralateral delay activity (CDA), a scalp recorded event-related brain potential, provides a reliable index of the number of objects held in visual working memory. Here we present evidence that the CDA not only indexes visual object working memory, but also the number of locations held in spatial working memory. In addition, we demonstrate that the CDA can be predictably modulated by the type of encoding strategy employed. When individual locations were held in working memory, the pattern of CDA modulation mimicked previous findings for visual object working memory. Specifically, CDA amplitude increased monotonically until working memory capacity was reached. However, when participants were instructed to group individual locations to form a constellation, the CDA was prolonged and reached an asymptote at two locations. This result provides neural evidence for the formation of a unitary representation of multiple spatial locations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Psychophysiology - Volume 113, March 2017, Pages 40-45
نویسندگان
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