title: Visual evoked potentials in migraine.
abstract: Migraine is a chronic disorder. Visual symptoms and hypersensitivity to light stimuli are common. The aim of this study is the analysis of visual system in migraineurs by visual evoked potentials (VEP). We studied 53 migraineurs (21 with prophylactic migraine treatment and 32 without preventive therapy) and 20 healthy control subjects. We found lower P100 latencies in migraineurs without therapy compared to controls. In treated patients, P100 latencies showed the same trend seen in the control group. We speculate a different responsiveness of the visual system in migraineurs probably due to a dysmodulation of sensor input leading to facilitation of visual processing.
authors.affiliation: Divisione di Neurologia, Ospedale Niguarda, Piazza Ospedale Maggiore 3, I-20162 Milan, Italy. chiara.spr@tiscali.it
authors.forename: C
authors.initials: C
authors.lastname: Spreafico
authors.forename: R
authors.initials: R
authors.lastname: Frigerio
authors.forename: P
authors.initials: P
authors.lastname: Santoro
authors.forename: C
authors.initials: C
authors.lastname: Ferrarese
authors.forename: E
authors.initials: E
authors.lastname: Agostoni
mesh_terms: D000328:Adult; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000503:physiopathology* / Q000517:prevention & control; D020325:Migraine with Aura / Q000503:physiopathology; D020326:Migraine without Aura / Q000503:physiopathology