Limb movement relies on neural circuit control, which involves parts of the cerebral motor cortex, extrapyramidal tract, brainstem, spinal cord, anterior horn of the spinal cord, secondary motor neurons, and muscles. Therefore, there are more causes of limb paralysis, as follows: 1, vascular disease: such as stroke, cerebral infarction and other cerebrovascular diseases, as well as spinal cord vascular disease; 2, trauma: trauma can lead to the occurrence of limb hemiparesis, or even general paralysis; 3, inflammation: such as encephalitis, brain abscess, peripheral neuritis; 4, myotonic dystrophy: such as myasthenia gravis.