[Cortical vertigo].
Dizziness of cortical origin is the subjective correlate of a disturbance of spatial orientation resulting from cerebrocortical dysfunction. Cortical dizziness in the form of vertigo is rare. If present, it most probably reflects a dysfunction of a vestibular representation in the insula. It may be accompanied by tinnitus, sensory disturbance and possibly also spontaneous nystagmus. The dysfunction of this region may result either from a focal seizure or from a lesion, for instance due to ischemia. Nondirectional, visual dizziness is most probably much more common than vertigo. This latter type of dizziness results from a functional disturbance of those parts of parietooccipital cortex, contributing to the discrimination of self-induced and externally-induced retinal image slip. It is not accompanied by additional symptoms and should immediately cease upon closure of the eyes or avoidance of ego motion.
Thier
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P
Neurologische Universitätsklinik Tübingen, Sektion für Visuelle Sensomotorik.
Haarmeier
T
T
D001931:Brain Mapping; D002540:Cerebral Cortex / Q000503:physiopathology*; D006801:Humans; D008575:Meniere Disease / Q000503:physiopathology; D009039:Motion Perception / Q000502:physiology; D009434:Neural Pathways / Q000503:physiopathology; D009949:Orientation / Q000502:physiology*; D014717:Vertigo / Q000503:physiopathology*; D014722:Vestibule, Labyrinth / Q000503:physiopathology