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目的 :探讨神经肌电图在臂丛受损诊断及定位中的作用。方法 :对 2 6例臂丛受损者采用表面电极法沿神经走行的不同部位顺向检测正中神经、尺神经、桡神经、肌皮神经、腋神经共 91条神经的感觉及运动传导速度 (或末端潜伏期 )、F波 ;并用同心圆针电极观察拇短展肌、小指展肌、指总伸肌、肱二头肌、三角肌、冈上肌、冈下肌共 114块肌肉的病理自发电位及募集形式。结果 :91条运动神经在不同节段收集共有 6 4条异常 (70 3% ) ;6 0条感觉神经有 40条异常 (6 6 7% ) ;2 6例中F波异常者 8例 (30 8% )。检测 114块肌肉 ,其中 5 9块肌肉静息状态出现≥两处纤颤和 (或 )正锐波 ; 49块肌肉重收缩时无运动单位电位 ,9块肌肉募集电位明显减小。结论 :神经肌电图在臂丛神经损伤的诊断及定位中具有重要作用。
Objective: To investigate the role of electromyography in the diagnosis and location of brachial plexus injury. Methods: Twenty-six patients with brachial plexus were examined for the sensory and motor velocity of 91 nerves, median nerve, ulnar nerve, radial nerve, musculocutaneous nerve and axillary nerve in different parts along the nerve by surface electrode Or the end of the incubation period), F wave; and concentric needle electrode to observe the abductor hallucistriatus, little finger abductor muscle, referring to the total extensor, biceps, deltoid, supraspinatus, Potential and raise the form. Results: A total of 64 abnormalities (70 3%) were detected in 91 segments of motor nerves, 40 abnormalities (60 6%) in 60 sensory nerves, and 8 of 30 8% ). A total of 114 muscles were detected. Fifty-nine of the muscles showed ≥2 fibrillation and / or positive sharpness at resting state. No significant motor unit potential was found in 49 muscles during re-contraction, and the recruitment potential of 9 muscles was significantly reduced. Conclusion: Electromyography plays an important role in the diagnosis and localization of brachial plexus injury.