Objective To establish the normal value of motor unit number estimation (MUNE) of thenar muscles, to study its relationship with age and test the reproducibility of the technique and its use in MND.

• 目的建立大鱼际肌运动单位估数(MUNE)正常值并研究与年龄的关系和该技术的重复性及其在运动神经元病(MND)中的应用。