An Optimized Abnormal Muscle Response Recording Method for Intraoperative Monitoring of Hemifacial Spasm and Its Long-Term Prognostic Value.

•Providing an optimized AMR recording method during MVD for HFS.•Optimized method improves the positive detection rate of AMR.•Optimized method increases accuracy of decompression effect prediction.•Increasing the immediate remission rate and reducing the delayed recovery rate.