کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
920907 1473873 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Age-related changes in feature-based object memory retrieval as measured by event-related potentials
ترجمه فارسی عنوان
تغییرات مربوط به سن در بازیابی حافظه شیء مبتنی بر ویژگی به وسیله پتانسیل مربوط به رویداد اندازه گیری می شود
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی


• We used ERPs to examine neural basis of semantic object retrieval in normal aging.
• Behavioral performance in older adults was comparable to younger adults.
• Comparable neural mechanisms used in both groups when features facilitated retrieval.
• Older adults used additional neural resources when features yielded no retrieval.

To investigate neural mechanisms that support semantic functions in aging, we recorded scalp EEG during an object retrieval task in 22 younger and 22 older adults. The task required determining if a particular object could be retrieved when two visual words representing object features were presented. Both age groups had comparable accuracy although response times were longer in older adults. In both groups a left fronto-temporal negative potential occurred at around 750 ms during object retrieval, consistent with previous findings (Brier, Maguire, Tillman, Hart, & Kraut, 2008). In only older adults, a later positive frontal potential was found peaking between 800 and 1000 ms during no retrieval. These findings suggest younger and older adults employ comparable neural mechanisms when features clearly facilitate retrieval of an object memory, but when features yield no retrieval, older adults use additional neural resources to engage in a more effortful and exhaustive search prior to making a decision.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biological Psychology - Volume 100, July 2014, Pages 106–114
نویسندگان
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