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Asymmetry of visual function in migraine with aura: Correlation with lateralisation of headache and aura

Khalil, Nofal M and Nicotra, Alessia and Wilkins, Arnold J (2011) 'Asymmetry of visual function in migraine with aura: Correlation with lateralisation of headache and aura.' Cephalalgia, 31 (2). pp. 213-221. ISSN 0333-1024

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Abstract

<jats:p> Background: Asymmetry of visual phenomena and headache is an important feature of migraine with aura. </jats:p><jats:p> Methods: This asymmetry was explored by assessment of visual illusions, hemifield spatial contrast detection (HCD) and hemifield pattern reversal visual evoked potentials (HVEPs) in 47 migraineurs with aura (MA), who were not taking prophylactic medications, and 62 controls with the same age range (16–59). </jats:p><jats:p> Results: Illusions were greater and HCD was poorer in MA than in controls. There were no group differences with respect to P100 amplitude. The longer the duration of migraine the poorer the HCD. When the aura was consistently unilateral it was associated with greater illusions, reduced HCD and reduced hemifield P100 amplitude. These findings were not related to the side of headache. </jats:p><jats:p> Conclusion: The lateralised changes suggest that the visual dysfunction occurs at a cortical level, and the correlation with the side of the aura suggests that dysfunction is most likely to occur in an area of preexisting anomaly of neural function. </jats:p>

Item Type: Article
Uncontrolled Keywords: Migraine; visual aura; visual illusions; hemifield spatial contrast detection (HCD); hemifield pattern reversal visual evoked potential (HVEP)
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 21 Nov 2011 14:02
Last Modified: 15 Jan 2022 00:36
URI: http://repository.essex.ac.uk/id/eprint/1548

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