Table 3: EMG Summary (Initial Visit)

On EMG there was diffuse abnormalities in lower extremities with increased insertional activity, increased spontaneous activity, increased motor unit duration, diminished recruitment and decreased interference pattern with positive short waves and fibrillation potentials present. These same findings were also observed in the bilateral upper brachioradialis and bicep muscles. The lumbar paraspinals, and cervical paraspinals showed no abnormalities.<b></b>

肌电图（Electromyography, EMG）检查显示下肢存在弥漫性异常，表现为插入活动增强、自发电活动增多、运动单位时限延长、募集减弱，可见短正相波与纤颤电位，且伴随干扰相降低。上述异常表现同样见于双侧上肢肱桡肌与肱二头肌。腰椎旁肌群及颈椎旁肌群未见异常。