Document Detail

Visual evoked potential abnormalities in migraine patients.
MedLine Citation:
PMID:  21061777     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Visual processing in migraine has been targeted indicating that the visual pathways are involved in the migraine pathophysiology. We aimed to assess the nature of visual evoked potential (VEP) changes in migraine patients and to evaluate the role of VEP in the diagnosis of migraine.
MATERIALS AND METHODS: We examined 31 female and 10 male patients with a migraine headache diagnosis according to the criteria of the International Headache Society. Control subjects had neither migraine and other types of primary headache nor familial history. VEP were elicited using a checkerboard by monocular and binocular pattern reversal stimulation. The latencies of N75, P100 and N145 and peak-to-peak amplitude of N75-P100 were measured. We compared VEP latencies and amplitudes of the monocular and binocular stimulation within each population.
RESULTS: The N75 and P100 latencies were found to be significantly longer in the study group than the control group (p = 0.014 and p = 0.034, respectively) while the amplitudes in the study group were lower (p = 0.014). N145 latency was found to be longer in patients with longer duration of disease (p < 0.05). P100 latency was found to be significantly longer in patients with aura than the patients without aura (p = 0.029). N75 latency, recorded by left monocular stimulation, was elongated and the amplitude was diminished with left hemicranial headache.
CONCLUSION: Measurement of VEP latency and amplitude is a valuable and reliable test for the diagnosis of migraine. Our results reflect a persisting dysfunction of precortical visual processing which might be relevant in the pathogenesis of migraine.
E Boylu; F M Domaç; A Koçer; Z Unal; T Tanridağ; O Us
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Electromyography and clinical neurophysiology     Volume:  50     ISSN:  0301-150X     ISO Abbreviation:  Electromyogr Clin Neurophysiol     Publication Date:    2010 Sep-Oct
Date Detail:
Created Date:  2010-11-10     Completed Date:  2010-12-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0327533     Medline TA:  Electromyogr Clin Neurophysiol     Country:  Belgium    
Other Details:
Languages:  eng     Pagination:  303-8     Citation Subset:  IM    
Division of Electrodiagnostic Neurology, Department of Neurology, Marmara University, Istanbul, Turkey.
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MeSH Terms
Analysis of Variance
Case-Control Studies
Evoked Potentials, Visual*
Migraine Disorders / physiopathology*
Photic Stimulation
Regression Analysis

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