Deviation of the subjective visual vertical (SVV) in anterior cerebral artery infarction

Abstract

Healthy humans can determine what is „upright“ within a mean error of less than±2.5 degrees of the earth vertical1. Errors in verticality perception, reflected in a deviation of subjective visual vertical (SVV), frequently occur in labyrinthine and peripheral vestibular nerve lesions2, as well as in brainstem and thalamic lesions involving central vestibular pathways1–4. So far, SVV deviation in supratentorial cortical lesions has only been reported in patients with middle cerebral artery infarctions affecting vestibular cortical areas5,6. Here, we present two cases of SVV deviation in anterior cerebral artery (ACA) infarction.