کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9408023 1613039 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Age-related changes in neural activity associated with concurrent vowel segregation
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Age-related changes in neural activity associated with concurrent vowel segregation
چکیده انگلیسی
Older adults exhibit degraded speech comprehension in complex sound environments, which may be related to overall age-related declines in low-level sound segregation. This hypothesis was tested by measuring event-related potentials (ERPs) while listeners identified two different vowels presented simultaneously. Older adults were less accurate than young adults at identifying the two vowels, although both groups improved similarly with increasing fundamental frequency differences (Δƒ0) between vowels. Reaction time data showed that older adults took more time to process stimuli, especially those with smaller Δƒ0. A negative ERP wave indexing the automatic registration of Δƒ0 (the object-related negativity) was reduced in older adults. In contrast, young and older adults showed a similar pattern of neural activity indexing attentive processing of Δƒ0. The results suggest that aging affects the ability to automatically segregate speech sounds.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cognitive Brain Research - Volume 24, Issue 3, August 2005, Pages 492-499
نویسندگان
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