Lívia Shirahige, Fernanda Nogueira, Lorena Melo, Ruxandra Ungureanu, Sérgio Rocha, Rodrigo Brito, Thyciane Mendonça, Abelardo de Farias, Maria das Graças Rodrigues de Araújo, Daniele Piscitelli, Kátia Monte-Silva
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引用次数: 0
Abstract
Background: A better understanding of migraine pathophysiology through standardized methods could facilitate the development of more effective therapeutic approaches for migraine sufferers. However, neurophysiological studies with migraine sufferers present larger variability, as most contain only a single measurement.
Objective: This observational study aimed to compare the cortical and visual excitability of migraine sufferers, individuals with other types of headaches, and healthy participants in response to pattern-reversal visual stimulation.
Methods: Fifty-nine individuals were classified by a neurologist into the following groups: (i) migraineurs (n = 25); (ii) other types of headaches (n = 23); (iii) healthy (n = 11). Habituation during pattern-reversal visual stimulation was assessed by visual evoked potentials. Visual and motor cortex excitability were evaluated before and after pattern-reversal visual stimulation.
Results: We found no intergroup differences in motor and visual excitability measures after pattern-reversal visual stimulation. Compared to the healthy group, migraineurs and individuals with other types of headaches displayed a reduction in phosphene threshold after pattern-reversal visual stimulation. Additionally, an increase in visual cortical excitability in these groups was also observed. Lastly, the habituation in individuals with migraines and other types of headaches was lower compared to healthy individuals. Therefore, the lack of habituation may not be exclusively associated with the pathophysiological mechanisms of migraine.
Conclusion: Individuals who experience headaches, including migraineurs, have an increased visual cortical excitability in response to visual stimuli. This finding is promising for guiding future neurophysiological research to identify cortical biomarkers in migraineurs and in other types of headaches.
期刊介绍：
This interdisciplinary journal publishes papers relating to the plasticity and response of the nervous system to accidental or experimental injuries and their interventions, transplantation, neurodegenerative disorders and experimental strategies to improve regeneration or functional recovery and rehabilitation. Experimental and clinical research papers adopting fresh conceptual approaches are encouraged. The overriding criteria for publication are novelty, significant experimental or clinical relevance and interest to a multidisciplinary audience. Experiments on un-anesthetized animals should conform with the standards for the use of laboratory animals as established by the Institute of Laboratory Animal Resources, US National Academy of Sciences. Experiments in which paralytic agents are used must be justified. Patient identity should be concealed. All manuscripts are sent out for blind peer review to editorial board members or outside reviewers. Restorative Neurology and Neuroscience is a member of Neuroscience Peer Review Consortium.
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