Positional Testing in Acute Vestibular Syndrome: a Transversal and Longitudinal Study

Abstract

The presence of acute direction-changing positional geotropic nystagmus, stronger direction-fixed positional nystagmus when turning the head to the fast phase side, and acute or chronic head hanging vertical CPPN should raise the suspicion for central AVS. Chronic geotropic and apogeotropic nystagmus following AVS constitute an underrecognized manifestation of vestibular compensation.