Abstract
The vestibular cortex is speculated to be involved in the perception of self-motion due to labyrinthine stimulation. In this study, we hypothesized that patients with lesions involving the vestibular cortex would show vestibular agnosia, and that nystagmus-sensation dissociation, which is demonstrated by brisk caloric nystagmus without simul-taneous sensation of vertigo, would be a feature of vestibular agnosia. We used singlephoton emission computed tomography (SPELT) to measure regional cerebral blood flow (rCBF) in two cerebrovascular patients with nystagmus-sensation dissociation. Both patients had ischemic lesions involving mainly the right parieto-temporal lobe. It is suggested that the parieto-temporal lobe contains the vestibular cortex.
