Chromatic induction in migraine

Xim Cerda-Company, Olivier Penacchio, Xavier Otazu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The human visual system is not a colorimeter. The perceived colour of a region does not only depend on its colour spectrum, but also on the colour spectra and geometric arrangement of neighbouring regions, a phenomenon called chromatic induction. Chromatic induction is thought to be driven by lateral interactions: the activity of a central neuron is modified by stimuli outside its classical receptive field through excitatory–inhibitory mechanisms. As there is growing evidence of an excitation/inhibition imbalance in migraine, we compared chromatic induction in migraine and control groups. As hypothesised, we found a difference in the strength of induction between the two groups, with stronger induction effects in migraine. On the other hand, given the increased prevalence of visual phenomena in migraine with aura, we also hypothesised that the difference between migraine and control would be more important in migraine with aura than in migraine without aura. Our experiments did not support this hypothesis. Taken together, our results suggest a link between excitation/inhibition imbalance and increased induction effects.
Original languageEnglish
Article number37
Number of pages14
JournalVision
Volume5
Issue number3
DOIs
Publication statusPublished - 6 Aug 2021

Keywords

  • Chromatic induction
  • Colour
  • Colour perception
  • Migraine
  • Psychophysics
  • Vision

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