Figure 1

Flow chart. Patients who showed vertical nystagmus in the BLT, along with their diagnosis. Analysis in this study was performed in 208 BPPV and 17 non-BPPV patients who exhibited vertical nystagmus in the BLT. BLT, Bow and Lean Test; BPPV, benign paroxysmal positional vertigo. PSC, posterior semicircular canal; HSC, horizontal semicircular canal; ASC, anterior semicircular canal.