A 62-year-old female had recurrent attacks of vertigo associated with tinnitus and impaired hearing of the left ear.
The findings of air CT cisternography suggested neurovascular compression syndromes (NVC) of the left eighth cranial nerve. Severe reduction of left galvanic response on the galvanic body sway test (GBST) suggested retrolabyrinthin disorder on the left.
After neurovascular decompression she became free of vertigo. The galvanic response on the left side recovered 2 months after operation.
It is thought that GBST is useful diagnosis of NVC of the eighth cranial nerve, and in the evaluation the progress (including the postoperative course).
