BACKGROUND: Electrophysiological change is one of the features of aging heart.
背景：电生理改变是老化心脏表现的主要特征之一。
Nerve electrophysiology plays an important role in diagnosis of MMN and CB is the characteristic manifestation of nerve electrophysiological change in MMN.
神经电生理检查对诊断起重要作用，节段性运动神经CB是MMN特征性的神经电生理表现。
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