Motor neuron disease ( MND) is a kind of unexplained for violation of brainstem motor nerve, damage to the spinal cord anterior horn cells and pyramidal tract as the main features of chronic progressive disease variability. 运动神经元病(MotorNeuronDiseaseMND)是一种原因不明的以侵犯脑干运动神经、损害脊髓前角细胞和锥体束为主要特征的慢性进行性变异性疾病。