کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6283178 | 1615153 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removal of visual feedback lowers structural variability of inter-digit force coordination during sustained precision pinch
ترجمه فارسی عنوان
از بین بردن بازخورد بصری، تغییرات ساختاری در هماهنگی نیروهای بین رقمی در هنگام خراب شدن دقیق دقت را کاهش می دهد
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
چکیده انگلیسی
This study examined the effects of visual feedback on inter-digit force coordination during a precision pinch. Sixteen healthy, right-handed subjects were instructed to pinch an instrumented apparatus for 1 min with a stable force output. Visual feedback was provided for the first 30 s and withdrawn for the second 30 s. Detrended fluctuation analysis (DFA) and detrended cross-correlation analysis (DCCA) methods were used to quantify the time-dependent structures of each digit's force and of the force correlation between the digits. After removing visual feedback, the DFA scaling exponent, αDFA, increased from 1.10 ± 0.12 to 1.29 ± 0.13 for the thumb and from 0.95 ± 0.08 to 1.33 ± 0.13 for the index finger (F1,95 = 372.47, p < 0.001); the DCCA scaling exponent, αDCCA, increased from 1.00 ± 0.08 to 1.33 ± 0.13 (t95 = 20.33, p < 0.001). Structural changes were observed beginning with the first 5 s epoch after the removal of visual feedback. The results provide evidence that removing visual feedback lowers the structural variability of inter-digit force coordination. This change is reflected in the high-level control strategy, resulting in the two digits being more tightly coupled under somatosensory feedback without visual inputs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 545, 17 June 2013, Pages 1-5
Journal: Neuroscience Letters - Volume 545, 17 June 2013, Pages 1-5
نویسندگان
Ke Li, Tamara L. Marquardt, Zong-Ming Li,