Typical lateral interactions, but increased contrast sensitivity, in migraine with aura

Asher, Jordi M. and O'Hare, Louise and Romei, Vincenzo and Hibbard, Paul B (2018) Typical lateral interactions, but increased contrast sensitivity, in migraine with aura. Vision, 2 (1). p. 7. ISSN 2411-5150

Full content URL: https://doi.org/10.3390/vision2010007

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Abstract

Individuals with migraine show differences in visual perception compared to control groups. It has been suggested that differences in lateral interactions between neurons might account for some of these differences. This study sought to further establish the strength and spatial extent of excitatory and inhibitory interactions in migraine using a classic lateral masking task. Observers indicated which of two intervals contained a centrally presented, vertical Gabor target of varying contrast. In separate blocks of trials, the target was presented alone, or flanked by two additional collinear, high contrast Gabors. Flanker distances varied between one and twelve wavelengths of the Gabor stimuli. Overall, contrast thresholds for the migraine group were lower than those in the control group. There was no difference in the degree of lateral interaction in the migraine group. These results are consistent with the previous work showing enhanced contrast sensitivity in migraine with aura for small, rapidly presented target, and suggest that impaired performance in global perceptual tasks in migraine may be attributed to difficulties in segmenting relevant from irrelevant features, rather than altered local mechanisms.

Keywords:Migraine-with-aura, lateral inhibition, collinear facilitation, contrast sensitivity
Subjects:C Biological Sciences > C830 Experimental Psychology
Divisions:College of Social Science > School of Psychology
ID Code:31067
Deposited On:07 Mar 2018 10:09

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