上半规管BPPV

Until recently, the research community has had a relatively poor understanding of the anterior canal form of BPPV (AC-BPPV). To our knowledge, the only

reported cases of AC-BPPV have occurred within the last 25 years. In 1994, Herdman et al. [16] analyzed 77 patients with BPPV and found that nine of them had AC-BPPV. In 1999, Honrubia et al. [17] performed a study in 292 patients with BPPV using an infrared camera and a Frenzel mirror,and found that four patients had AC-BPPV.