Pseudo-Spontaneous and Head-Shaking Nystagmus in Horizontal Canal Benign Paroxysmal Positional Vertigo

Abstract

HSN is more common and mostly contralesional in apogeotropic HC-BPPV. HSN may be a lateralizing sign in apogeotropic HC-BPPV. Different prevalence and patterns of HSN in apogeotropic and geotropic HC-BPPV suggest dissimilar cupular dynamics in those disorders.