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Influence of disease duration on visual evoked potentials in migraineurs
C Yücesan1, O Sener, N Mutluer
1Ankara University Faculty of Medicine, Department of Neurology, Turkey.
Objective:
To determine the possible influence of the duration of migraine on pattern-reversal visual evoked potentials.
Methods:
An investigation was conducted in 49 patients with migraine without aura according to the International Headache Society criteria. Twenty-two of these patients had had migraine for 2 years or less (group 1), and the other 27 patients had had the disease for 10 years or more (group 2). The control group consisted of 17 healthy subjects.
Results:
Comparison of the mean P100 latency and amplitude showed no significant difference among the groups. There was, however, a good negative correlation between age and latency (r = -0.59, P =.003) in group 1, but no such correlation was observed for group 2 or the control group.
Conclusions:
It was concluded that the duration of migraine has no influence on pattern-reversal visual evoked potentials and that the pathogenesis of early- and late-onset migraine may be different.