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系統識別號 U0026-3108201317165600
論文名稱(中文) 持續軌跡運動下當肌肉疲勞時對肩膀共同收縮之影響
論文名稱(英文) The influence of co-contraction on shoulder muscle during dynamic tracking tasks
校院名稱 成功大學
系所名稱(中) 國際經營管理研究所碩士在職專班
系所名稱(英) Institute of International Management (IIMBA--Master)(on the job class)
學年度 101
學期 2
出版年 102
研究生(中文) 許家毓
研究生(英文) Chia-Yu Hsu
學號 R36001194
學位類別 碩士
語文別 中文
論文頁數 79頁
口試委員 指導教授-林明毅
口試委員-洪維憲
口試委員-黃英修
中文關鍵字 肩膀  肌電圖  共同收縮  小波轉換 
英文關鍵字 shoulder  electromyography  co-contraction  wavelet 
學科別分類
中文摘要 由於在各種工作環境中上肢的使用頻繁,因此也造成了許多上肢肌肉骨骼方面的不適與傷害。一般認為,肌肉骨骼不適是由於高重複性的動作、工作姿勢不良等因素造成。而在上肢部位中,肩膀是經常出現肌肉骨骼不適之部位,且由於肩膀的活動度大,能進行許多不同的3D 動作,故本研究以肩膀為主軸,並探討在重複性的軌跡描繪運動下,其周邊肌肉間共同收縮程度之情形,並討論此一機制對於工作績效之影響。此外,為進一步進行訊號的頻域處理,本研究採用適合用於非穩定的肌電訊號小波轉換,了解小波轉換相較於短時傅立葉轉換是否更適合用於肌肉疲勞之偵測上。
本研究共招收16 名健康受試者,8 名男性,8 名女性,皆為慣用右手者。實驗將依序進行最大自主收縮試驗-軌跡描繪試驗-疲勞試驗-軌跡描繪試驗-最大自主收縮試驗。以肌電圖監測鎖骨胸大肌、前三角肌、中三角肌、上斜方肌、前鋸肌、棘上肌和棘下肌共7 條肌肉。在訊號時域處理部分,以200ms 為間隔,進行均方根值之計算。在頻域處理部分,以1s 為間隔,進行短時傅立葉與連續小波轉換(小波轉換之小波函數為db4)計算出每條肌肉之中位頻率,並以其時間變化之斜率判斷受試者的肌肉是否達到疲勞。在共同收縮指標部分,依照肩膀動作選出6 組肌肉進行計算,分別有:鎖骨胸大肌/中三角肌、鎖骨胸大肌/前三角肌、鎖骨胸大肌/棘上肌、棘下肌/棘上肌、棘下肌/前三角肌、棘下肌/鎖骨胸大肌。另外,本研究也分別計算受試者描繪軌跡之準確度、平均描繪時間以及平均描繪速度來進行受試者的工作績效指標分析。
研究結果顯示,在疲勞前後之共同收縮出現部分上升與部分下降,結果並沒有一致性的現象。在描繪準確度的結果,準確度會在肌肉疲勞之後下降,證實肌肉疲勞會影響到描繪時的準確度。在本研究中,並未發現共同收縮與準確度間有固定關係存在。推論除了可能受到肌肉疲勞程度影響外,本研究中為監測之肌肉所造成之影響,也值得後續研究探討。
英文摘要 Musculoskeletal disorders of upper extremity is prevalent in the industrial environment, especially around shoulder regions. It is evidenced that high repetitiveness of manual exertion is one of the risk factors of musculoskeletal disorders.
This study aimed to first, discuss the relationship between muscle co-contraction and the task performance during repetitive trajectory drawing task, and second, to compare the effectiveness on fatigue detection between wavelet transform and short time fourier transform.
Sixteen health young subjects were recruited to perform a serious of repetitive trajectory drawing, before and after a fatigue task. Electromyography was used to monitor the muscular activity of pectoralis clavicular head (PCH), anterior deltoid (AD), middle deltoid (MD), upper trapezius (UT), serratus anteriors (SA), supraspinatus (SS), and infraspinatus (ISS) throughtout the whole experiment. EMG signals were post processing via wavelet and short time fourier transform throughout the frequency domain analysis. Six pairs of muscles co-contraction index were calculated for PCH/MD, PCH/ AD, PCH/SS, ISS/SS, ISS /AD, and ISS/PCH. To objective quantify the influence of muscle fatigue on task performance, drawing deviation rate, the average drawing time, and the average drawing speed were measured.
The results of co-contraction index showed that in both directions the pairs with PCH involved are all increased after muscular fatigue. The drawing deviation rate also decreased in both directions. Result of frequency analysis of EMG data demonstrated that the slope in medial frequency from either wavelet transform or short time fourier transform all decease.
The result of this study, however does not find a definite relationship between muscle co-contraction and the drawing deviation rate of repetitive movement in 3D dynamic shoulder movement. The future study should consider using needle EMG with more restricted experiment design in order to discover the unsolved mechanism.
論文目次 摘要 I
Abstract III
誌謝 IV
目錄 V
表目錄 VII
圖目錄 VII
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的與假設 2
1.3 研究限制 2
1.4 研究架構 3
第二章 文獻探討 5
2.1 肌電圖(Electromyography) 5
2.1.1 肌電圖與疲勞偵測間之關係 6
2.1.2 肌電訊號分析 6
2.2 肌肉疲勞 15
2.3 共同收縮(co-contraction) 17
2.3.1 共同收縮與疲勞之關係 18
2.3.2 共同收縮與移動精準度(accuracy)之關係 19
2.3.3 共同收縮與關節僵硬間的關係 20
2.3.4 共同收縮指標(Co-Contraction Index,CCI) 20
第三章 研究方法 23
3.1 研究變數 23
3.2 研究對象 23
3.3 實驗設備與儀器 24
3.4 實驗流程 26
3.5 實驗資料分析 33
3.5.1 時域分析 33
3.5.2 頻域分析 34
3.5.3 分析指標 35
3.6 統計分析 37
第四章 結果 38
4.1 受試者基本資料 38
4.2 最大自主收縮(MVIC)之肌電訊號表現 39
4.3 兩次軌跡試驗之肌電圖表現 41
4.4 兩次軌跡試驗之工作績效指標表現 49
4.4.1 兩次軌跡試驗之描繪準確率表現 49
4.4.2 兩次軌跡試驗之描繪時間表現 50
4.4.3 兩次軌跡試驗之描繪速度表現 51
4.5 疲勞試驗前後之肌肉共同收縮指標之表現 52
第五章 討論 54
5.1 最大等長自主收縮(MVIC)之表現 54
5.2 正式軌跡試驗之表現 54
5.3 共同收縮指標與準確度之表現 55
第六章 結論 57
第七章 未來研究建議 58
參考文獻 60
附錄一、受試者基本資料 68
附錄二、北歐肌肉骨骼問卷 69
附錄三、IPAQ 台灣活動量調查短版問卷 76
附錄四、知覺施力評價量表(RPE) 79
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