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Findings of video-head impulse tests (video-HITs). (A) Four days after symptom onset, video-HITs showed decreased gains of the vestibulo-ocular reflex for the right horizontal (HC) and anterior semicircular canals (AC) while that for right posterior semicircular canal (PC) is normal. (B) Follow-up video-HITs, 10 days after symptom onset, showed a decreased gain only for right HC. (C) Two months after symptom onset, findings of video-HITs were normal.
