Low frequency group treatment: The treatment frequency is selected as 50Hz, pulse width 0.3ms, waveform is intermittent waveform, stimulation intensity is tolerated by the patient, the instrument program is set to stimulate the first group of acupoints → second group → first group → third group, forming a set of programmed movements, cyclic operation, appearing alternate movements of flexor and extensor muscles, namely: wrist dorsal extension, five-finger extension → five-finger flexion → wrist dorsal extension, five-finger extension → thumb-index finger pair pinching, simulating fine movements Grasp of the hand, thumb-index finger pair pinch. The treatment course was the same as that of the electroacupuncture group.

Electroacupuncture group treatment: After the above acupuncture to deqi, choose KWD-808 Ⅰ type Indy brand pulse acupuncture treatment instrument, the waveform is continuous wave, the stimulation frequency is 2Hz, the intensity to be tolerated by the patient. There should be muscle contraction at the acupuncture site during electroacupuncture treatment. The treatment time should be 30 minutes each time, once a day, 6 days a week with 1 day off, for a total of 3 weeks.

In order to determine the efficacy of low-frequency acupoint electrical stimulation and electroacupuncture to improve thumb to finger action after stroke

sEMG eigenvalues: two main aspects, maximum value (MAX), and root mean square value (RMS). MAX reflects the maximum contraction strength of the measured muscle. RMS is the root mean square of the EMG transient amplitude over time, which reflects the average change in EMG signal and is therefore used as an evaluation of muscle contraction performance.

In this study, the upper extremity and hand muscle strength and motor function were assessed to evaluate the efficacy of patients, and the consciousness, upper extremity and hand evaluation components were selected for assessment. The lower the CSS score, the better the improvement in neurological deficits.

Clinical efficacy was assessed using the nimodipine method as a percentage reduction in CSS score: [(pre-treatment score - post-treatment score)/pre-treatment score] × 100%. Basic healing: reduction rate ≥90%; Significant improvement: 46%≤ minus rate <90%; Progress: 18%≤ minus rate <46%; The ratio of the sum of basic healing, obvious progress, and progress to the sample size of a single group is the total effective rate of the group.