Effect of transcutaneous electrical acupoint stimulation on motor function recovery of upper limb spasticity after stroke

INTERVENTION: Sham TEAS group:Pseudo‐transcutaneous electrical acupoint stimulation of the affected upper limb acupoints;TEAS group:Transcutaneous electrical acupoint stimulation of the affected upper limb acupoints; CONDITION: Upper limb spasm after stroke PRIMARY OUTCOME: Upper limb Fugl‐Meyer assessment; SECONDARY OUTCOME: Effective improvement rate;Myoelectric activity of muscle;Degree of muscle spasm;Motor function;Ability of daily living;Degree of pain; INCLUSION CRITERIA: 1. In line with the diagnostic criteria of Western medicine: referring to the diagnostic criteria of cerebral infarction in the Guidelines for Diagnosis and Treatment of Acute Ischemic Stroke in China formulated by the Cerebrovascular Disease Group of the Neurology Society of the Chinese Medical Association in 2018, all cases were diagnosed by CT or MRI; 2. In line with the diagnostic criteria of traditional Chinese medicine: refer to the Guidelines for Diagnosis and Treatment of Common Diseases in Internal Medicine of Traditional Chinese Medicine‐Stroke (ZYYXH/T22‐2008) issued by the Chinese Society of Traditional Chinese Medicine; 3. The onset time was 6 months to 12 months; 4. Upper limb spasm, 20 = FMA‐UE = 50; 5. Age between 30 and 75 years old; 6. The vital signs are stable, the consciousness is clear, the language communication has no obvious obstacle, and the cognitive function is basically normal; 7. Informed consent signed by the pa