title: [Illusion of visual tilt: a case].
abstract: A 21-year-old man experienced sudden and intense rotational vertigo. A moment later, he was amazed to see the whole visual world rotate clockwise progressively by about 160 degrees. On the following day, the visual tilt was only 30 degrees, and it soon receded completely, while headache appeared. CT scan, magnetic resonance imaging, vertebral arteriography, and cerebrospinal fluid analysis were normal, and the aetiology could not be ascertained. Illusions of visual tilt are an unusual consequence of disorders affecting the vestibular system. The locus of the impairment is usually in the brainstem, particularly in association with Wallenberg's syndrome. However, the peripheral vestibular pathways or the vestibular projections into the cerebral cortex may occasionally be involved. In the latter case, the visual tilt is part of a vestibular epileptic seizure.
authors.affiliation: Clinique des Maladies du Système Nerveux, Hôpital de la Salpêtrière, Paris.
authors.forename: L
authors.initials: L
authors.lastname: Cohen
authors.forename: L
authors.initials: L
authors.lastname: Belec
authors.forename: P
authors.initials: P
authors.lastname: Lacoste
authors.forename: J L
authors.initials: JL
authors.lastname: Signoret
mesh_terms: D000328:Adult; D001927:Brain Diseases / Q000150:complications; D006801:Humans; D007088:Illusions / Q000209:etiology; D008297:Male; D010523:Peripheral Nervous System Diseases / Q000150:complications; D013028:Space Perception; D014717:Vertigo / Q000209:etiology* / Q000503:physiopathology; D014796:Visual Perception
vernacular_title: Illusion visuelle d'obliquité: un cas.