1. Eye position of positional nystagmus in the right-ear-down and left-ear-down head positions in patients with horizontal canal type of benign paroxysmal positional vertigo.
Eye position of positional nystagmus in the right-ear-down and left-ear-down head positions in patients with horizontal canal type of benign paroxysmal positional vertigo. (A) Persistent geotropic positional nystagmus in patient A and (B) persistent apogeotropic positional nystagmus in patient B.
Takao Imai et al. BMJ Open 2015;5:e006607
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