Dynamic changes of abnormal muscle response during decompression procedures in double compression-type hemifacial spasm

In DC-type HFS, precise preoperative diagnosis and intraoperative identification of the culprit vessel are difficult. In DC-type HFS, decompression of one side of a vessel may exacerbate the compression of the other side. In such a case, AMR helps us become aware of compressions in CP that we may preoperatively overlook. AMR is useful for identifying the exact culprit vessels and recognizing any compression changes caused by intraoperative manipulations.