کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6285433 1296817 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Corticomuscular and bilateral EMG coherence reflect distinct aspects of neural synchronization
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Corticomuscular and bilateral EMG coherence reflect distinct aspects of neural synchronization
چکیده انگلیسی
Using electroencephalography (EEG) and electromyography (EMG), corticomuscular and bilateral motor unit synchronization have been found in different frequency bands and under different task conditions. These different types of long-range synchrony are hypothesized to originate from distinct mechanisms. We tested this by comparing time-resolved EEG-EMG and EMG-EMG coherence in a bilateral precision-grip task. Bilateral EMG activity was synchronized between 7 and 13 Hz for about 1 s when force output from both hands changed from an increasing to a stable force production. In contrast, EEG-EMG coherence was statistically significant between 15 and 30 Hz during stable force production. The disparities in their time-frequency profiles accord with the existence of distinct underlying processes for corticomuscular and bilateral motor unit synchronization. In addition, the absence of synchronization between cortical activity and common spinal input at 10 Hz renders a cortical source unlikely.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 463, Issue 1, 29 September 2009, Pages 17-21
نویسندگان
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