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  • 期刊

Isokinetic Strength and Electromyographic Analysis of Knee Muscles in Parkinsonian Patients and Normal Subjects

巴金森氏病患與正常人膝部等速肌力及肌電圖反應之比較

摘要


本研究的目的是比較正常人與巴金森氏患者膝關節等速肌力與肌電圖的變化。五位巴金森氏患者(平均年齡59.0歲,範圍45至76歲),與十五位正常人(平均年齡57.1歲,範圍44至75歲)參與本計畫。巴金森氏患者依侯罕及楊氏(Hoehn and Yahr)分期標準評估為輕中度(stage II and III),具有步行能力,平均發病為8.2年(範圍1至15年)。受試者採坐姿接受等速肌力儀(Cybex 6000; Lumex Co., USA)測量膝伸肌(股四頭肌)與膝屈肌(膕旁肌;大腿後肌)於不同角速度收縮的肌力。同時,將銀氯(Ag/AgCl)表面電極置於股四頭肌與膕旁肌,以記錄肌肉收縮時肌電圖的變化。 本研究結果如下:(1)於60, 90及120度/秒的角速度收縮,巴金森氏患者膝伸肌與屈肌的最高力矩與體重百分比值(PT/BW)明顯低於正常人;(2)於60度/秒的角速度收縮時,巴金森氏患者膝伸肌與屈肌的初期肌電圖反應(initial EMG)明顯低於正常人;(3)巴金森氏患者膝屈肌於60度/秒的角速度收縮時,拮抗肌有共同收縮(co-contraction),而膝伸肌於120度/秒的角速度收縮時,拮抗肌有共同收縮現象。本研究的結論是巴金森氏患者的物理治療應強調快慢速之肌力訓練,同時,需促進拮抗肌的肌肉放鬆(尤其是慢速),以改善日常生活功能。

並列摘要


The purposes of this study were to analyze the peak torque and the electromyographic (EMG) activity of knee flexors and extensors at different speeds in normal subjects and patients with Parkinson's disease (PD). Five Parkinsonian patients (mean age 59.0 years, range 45 to 76 years old) and fifteen normal subjects (mean age 57.1 years, range 44 to 75 years old) participated in this study. The Parkisonian patients in Hoehn and Yahr stage of II-III were ambulatory and the mean duration of illness were 8.2 years (range 1-15 years). All subjects received isokinetic muscle strength testing of unilateral knee flexors and extensors by Cybex 6000 dynamometer (Lumex Co., U.S.A.). The patients sat in upright position and surface electrodes were placed at knee flexors and extensors to record quadriceps and hamstring EMG. The results were: (1) the concentric peak torques of knee extensors and flexors in Parkinsonian patients at 60°/sec, 90°/sec and 120°/sec were significantly less than those in normal subjects, (2) the initial EMG activities at 60°/sec in Parkinsonian patients were significantly less than that in normal subjects, (3) co-contraction ratios of flexors at 60°/sec and knee extensors at 120°/sec in Parkinsonian patients were significantly higher than that in normal subjects. The conclusion was that the muscle strengthening exercise combined with reciprocal inhibition (relaxation), especially at slow speed, would be beneficial for Parkinsonian patients.

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