کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
928214 1474219 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of dual-tasking on arm muscle responses in young and older adults
ترجمه فارسی عنوان
اثرات کار دوگانه بر .اکنش های عضلات بازو در بزرگسالان جوان و مسن
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی


• Examined whether dual-tasking affects arm muscle responses to a loss of balance.
• Few changes in muscle activity when dual-tasking or with greater task difficulty.
• Older adults’ arm responses were largely unaffected by dual-tasking.
• Compensatory arm muscle responses do not appear to require attentional resources.

This study examined whether dual-tasking affects an individual’s ability to generate arm muscle responses following a loss of balance. Nineteen young and 16 older adults recovered their balance in response to a surface translation. This balance task was either completed on its own or while counting backwards by 2’s (easy counting difficulty) or 7’s (hard counting difficulty). With increasing counting difficulty, less attentional resources were assumed to be available for balance recovery. The ability to generate arm muscle responses was quantified through the measurement of electromyographic (EMG) onset latencies and amplitudes from three arm muscles. Results indicated that the attentional requirements of the counting task did not greatly affect EMG onset latencies or amplitudes for both young and older adults. Even when an effect was observed, the magnitude of change was small (e.g., ∼3 ms earlier EMG onset and ∼2.0%MVC smaller EMG amplitude during the dual- compared to the single-task conditions). Thus, the generation of arm muscle responses do not appear to require a significant amount of attentional resources and the decreased ability to cope with cognitive interference with ageing is unlikely to explain why older adults have difficulty in generating arm responses following a loss of balance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Human Movement Science - Volume 46, April 2016, Pages 159–166
نویسندگان
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