The online version of this article (doi:10.1186/1129-2377-15-44) contains supplementary material, which is available to authorized users.
Weiping Yang, Bingqian Chu contributed equally to this work.
The authors declare that they have no competing interests.
Conceived and designed the experiments: WY, JY, and JW. Recruited and diagnosed the patients: BC and SY. Performed the experiments: WY, BC, YY, and SY. Analyzed the data: WY, BC, JY, JW, and SY. Wrote the paper: WY, JY, JW, and SY. All authors read and approved the final manuscript.
Photophobia and phonophobia are the most prominent symptoms in patients with migraine without aura. Hypersensitivity to visual stimuli can lead to greater hypersensitivity to auditory stimuli, which suggests that the interaction between visual and auditory stimuli may play an important role in the pathogenesis of migraine. However, audiovisual temporal interactions in migraine have not been well studied. Therefore, our aim was to examine auditory and visual interactions in migraine.
In this study, visual, auditory, and audiovisual stimuli with different temporal intervals between the visual and auditory stimuli were randomly presented to the left or right hemispace. During this time, the participants were asked to respond promptly to target stimuli. We used cumulative distribution functions to analyze the response times as a measure of audiovisual integration.
Our results showed that audiovisual integration was significantly elevated in the migraineurs compared with the normal controls (p < 0.05); however, audiovisual suppression was weaker in the migraineurs compared with the normal controls (p < 0.05).
Our findings further objectively support the notion that migraineurs without aura are hypersensitive to external visual and auditory stimuli. Our study offers a new quantitative and objective method to evaluate hypersensitivity to audio-visual stimuli in patients with migraine.
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