插入电位减少或消失见于严重的肌肉萎缩、肌肉纤维化和脂肪组织浸润以及肌纤维兴奋性降低等；插入电位的延长或增多提示肌肉易激惹或肌膜不稳定，见于失神经支配的肌肉或炎性肌病。
... 面肌电图 electromyogram of face 异常肌电图 abnormal electromyogram 诱发肌电图 evoked electromyogram ...
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结果PM/DM以肌无力、肌肉压痛、血清肌酶谱增高为主要临床表现，伴肌电图及病理学检查异常；
Results The main clinical presentations of PM/DM included amyosthenia, muscular tenderness, elevation of serum enzymes, accompanied by abnormal electromyography and muscular pathology.
总体评价出口梗阻型便秘的盆底肌电图异常率高达95·56%。
Total evaluation The abnormality rate by pelvic floor electromyography was 95.56% in OOC.
结论：ALS起病部位不同，下运动神经元区域肌电图异常分布情况也不同。
Conclusions: in ALS patients, different site of onset symptoms determine different distribution of abnormal EMG.
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