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Titolo:
MULTICHANNEL VISUAL-EVOKED POTENTIALS IN MIGRAINE
Autore:
TAGLIATI M; SABBADINI M; BERNARDI G; SILVESTRINI M;
Indirizzi:
UNIV ROMA TOR VERGATA,DIPARTIMENTO SANITA PUBBL,NEUROL CLIN,VIA O RAIMONDO 8 I-00173 ROME ITALY IRCCS S LUCIA ROME ITALY
Titolo Testata:
Electroencephalography and clinical neurophysiology. Evoked potentials
fascicolo: 1, volume: 96, anno: 1995,
pagine: 1 - 5
SICI:
0168-5597(1995)96:1<1:MVPIM>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEADACHE; ABNORMALITIES; ASYMMETRIES; FIELD; AURA;
Keywords:
VISUAL EVOKED POTENTIALS; MIGRAINE; VISUAL AURA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
M. Tagliati et al., "MULTICHANNEL VISUAL-EVOKED POTENTIALS IN MIGRAINE", Electroencephalography and clinical neurophysiology. Evoked potentials, 96(1), 1995, pp. 1-5

Abstract

Multichannel recordings of visual evoked potentials (VEPs) have proved to be useful in the evaluation of visual field defects. We studied the topographic distribution of transient VEPs in 15 migraine patients (8 with visual aura and 7 without) and 15 age-matched controls during the migraine-free interval. All the subjects included in the study hadnormal visual fields. VEPs were recorded from 9 electrodes placed on the posterior scalp. Stimuli were full-field and hemifield reversing square wave grating patterns of medium spatial frequency (4 c/deg). Thegroups did not show significant differences in latencies and amplitudes of the major components (N70, P100) recorded from the midline. However, migraine patients with visual hemianopic aura showed definite asymmetries in the VEP amplitude distribution. Significantly reduced, absent or polarity-invered VEP responses were recorded ipsilateral to theside of the prodromic visual symptoms. Direct comparison of affected and unaffected hemispheres by partial field stimulation confirmed these findings. According to the VEP cortical generator theory, these abnormalities suggest a functional anomaly consistent with the clinical syndrome and detectable also in the migraine-free interval. None of the migraine patients without aura or the controls showed VEP amplitude asymmetries. We conclude that multichannel VEP recordings may discriminate between different subtypes of migraine and contribute important physiopathological information to the study of this disease.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 16:14:39