思维作业期间，在不进行任何外界刺激的情况下，通过左右手想象运动就可以直接获取思维脑电。

Under the condition of no stimulation during the mental tasks, mental EEG can be obtained direcetly through left-right hands imagery movement.

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下肢想象动作的脑电特征提取是基于脑-机接口技术实现下肢运动神经重建的关键点和难点。

EEG feature extraction from imaginary lower limb motor tasks is the key and difficult point of motor nerve reconstruction for lower limbs based on brain-computer interface technology.

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