Tomonaga T
Department of Orthopaedic Surgery, Nagasaki University School of Medicine, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1988 Jun;62(6):617-26.
To quantitatively analyze the electromyographic activity of the shoulder girdle muscles during elevation of the arm, the action potentials of nine muscles were integrated over 10-degree intervals of corresponding elevation angle. The trapezius, supraspinatus and deltoideus (anterior and middle fibers) muscles showed high activity and their activity increased in accordance with the magnitude of the elevation angle. The integrated EMG activity in the trapezius, supraspinatus and deltoideus (middle and posterior fibers) muscles increased as the plane of elevation was changed from the sagittal plane to the frontal plane. The correlation between the calculated work and the integrated EMG activity during scapular abduction from 0 to 90 degrees was analyzed. The regression coefficients of the trapezius, supraspinatus and deltoideus (anterior and middle fibers) muscles were higher than those of other muscles. The correlation coefficient of the supraspinatus was significantly lower than those of the trapezius, deltoideus and pectoralis major muscles.
为了定量分析手臂抬高过程中肩带肌的肌电活动，在相应抬高角度的10度间隔内对9块肌肉的动作电位进行积分。斜方肌、冈上肌和三角肌（前部和中部纤维）表现出高活性，且其活性随抬高角度的增大而增加。当抬高平面从矢状面变为额状面时，斜方肌、冈上肌和三角肌（中部和后部纤维）的积分肌电活动增加。分析了从0度到90度肩胛骨外展过程中计算出的功与积分肌电活动之间的相关性。斜方肌、冈上肌和三角肌（前部和中部纤维）的回归系数高于其他肌肉。冈上肌的相关系数显著低于斜方肌、三角肌和胸大肌的相关系数。
