Kanakamedala R V, Hong C Z
Rehabilitation Medicine Service, Veterans Administration Medical Center, Long Beach, CA 90822.
Arch Phys Med Rehabil. 1988 May;69(5):344-7.
Electromyography (EMG) and nerve conduction studies were performed on a patient with an incomplete lesion of the median nerve involving the motor fibers to the thenar muscles, the palmar cutaneous branches, and the sensory fibers to the index finger. The studies were done before, and 13 weeks, 16 weeks, and one year after grafting. The preoperative electrodiagnostic evaluation showed abnormalities involving the median motor fibers and the palmar cutaneous branch. Electromyography of the opponens pollicis and abductor pollicis brevis before surgery showed severe active denervation. Thirteen weeks after nerve grafting, the median motor distal latency was prolonged and the amplitude of the evoked potential of the median motor and index finger digital sensory nerves were decreased. At 16 weeks, both the latency and amplitude showed improvement, as did EMG of the affected muscles. One year later, the electrophysiologic findings were normal except for a slightly prolonged median motor distal latency. Clinical and functional improvement after grafting correlated well with the electrophysiologic findings. We conclude that EMG and nerve conduction studies are useful tools for following the progression of recovery after nerve grafting.
对一名正中神经不完全损伤患者进行了肌电图（EMG）和神经传导研究，该损伤累及到鱼际肌的运动纤维、掌皮支以及示指的感觉纤维。研究在移植术前、术后13周、16周和1年进行。术前电诊断评估显示正中运动纤维和掌皮支存在异常。术前对拇对掌肌和拇短展肌的肌电图显示严重的主动失神经支配。神经移植术后13周，正中运动远端潜伏期延长，正中运动和示指指感觉神经诱发电位的波幅降低。16周时，潜伏期和波幅均有改善，受累肌肉的肌电图也有所改善。1年后，除正中运动远端潜伏期略有延长外，电生理检查结果正常。移植术后的临床和功能改善与电生理检查结果密切相关。我们得出结论，肌电图和神经传导研究是跟踪神经移植后恢复进程的有用工具。
