摘要
1.用多线肌电描记方法,观察20例健康男性医学生的三角肌、斜方肌及前锯肌在肩关节运动时所产生的动作电位。2.前屈、外展及后伸肱骨时,三角肌三个部分都有动作电位产生,随着肱骨运动角度增大,三角肌的动作电位逐渐增强,前屈及外展肱骨到180°时,三角肌出现最强动作电位。3.上肢下垂于体侧时,三角肌前部不参与肱骨旋内;但在有阻力族内及并合其他动作旋内时,则三角肌前部参与肱骨旋内。4.肌电描记证明,在前屈和外展肱骨时,肱骨与肩胛骨的运动是同时的;在前屈和外展肱骨到180°过程中,肩胛骨的运动方式是有所不同的。
1.Simultaneous electromyographic recordings were made from the anterior,middle and posterior parts of the deltoideus,the upper,middle and lower parts of trapezius and the serratus anterior by means of surface electrodes and an 8 channel,penwriting,Kersers’electroencephalograph during movements of flexion,abduction,extension,medial and lateral rotations and circumduction of the humerus on 20 healthy medical students.2.Action potentials were recorded from the three parts of the deltoideus during flexion,abduction and extension.The amplitude and frequency of the action potentials of this muscle are increased gradually from 0 to 180 degrees and arriving to its maxi-mum at 180 degrees of flexo-abduction.3.The anterior part of the deltoideus does not participate to the medial rotation of the humerus while the upper extremity hanging at the side but it does as the arm being abducted.4.The electromyograms clearly demonstrate that both humerus and scapula act simultaneously in flexion,abduction and extension of the arm.
作者
陆光庭
LU KUANG-TING(Department of Anatomy,Qingdao Medical College)
出处
《解剖学报》
CAS
1965年第4期550-558,共9页
Acta Anatomica Sinica
