頁籤選單縮合
題 名 | Synergic Co-Activation of Muscles in Elbow Flexion via Fractional Brownian Motion |
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作 者 | Chang, Shyang; Hsyu, Ming-chun; Cheng, Hsiu-yao; Hsieh, Sheng-hwu; | 書刊名 | 中國生理學雜誌 |
卷 期 | 51:6 2008.12[民97.12] |
頁 次 | 頁376-386 |
分類號 | 361.18 |
關鍵詞 | Synergic co-activation of elbow flexion; Synergy of coupled muscles; Fractional brownian motion; Fractal dimension; Reciprocal inhibition; Synchronization of rhythms; |
語 文 | 英文(English) |
英文摘要 | In reflex and volitional actions, co-activations of agonist and antagonist muscles are believed to be present. Recent studies indicate that such co-activations can be either synergic or dyssynergic. The aim of this paper is to investigate if the co-activations of biceps brachii, brachialis, and triceps brachii during volitional elbow flexion are in the synergic or dyssynergic state. In this study, two groups with each containing six healthy male volunteers participated. Each person of the first group performed 30 trials of volitional elbow flexion while each of the second group performed 30 trials of passive elbow flexion as control experiments. Based on the model of fractional Brownian motion, the intensity and frequency information of the surface electromyograms (EMGs) could be extracted simultaneously. No statistically significant changes were found in the control group. As to the other group, results indicated that the surface EMGs of all five muscle groups were temporally synchronized in frequencies with persistent intensities during each elbow flexion. In addition, the mean values of fractal dimensions for rest and volitional flexion states revealed significant differences with P<0.01. The obtained positive results suggest that these muscle groups work together synergically to facilitate elbow flexion during the co-activations. |
本系統中英文摘要資訊取自各篇刊載內容。