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Visual processing in migraineurs depends on the migraine cycle.
Kerstin Luedtke1,2, Laura H Schulte1, Arne May1
1Department of Systems Neuroscience, University Medical Center Eppendorf, Hamburg, Germany.
Annals of Neurology
|December 18, 2018
Summary
Migraineurs exhibit altered visual after-image duration, with shorter durations between attacks and longer durations during attacks, suggesting a fluctuating visual cortex equilibrium. This research offers insights into migraine pathophysiology.
Area of Science:
- Neuroscience
- Ophthalmology
- Neurology
Background:
- Migraine is a complex neurological disorder often associated with visual disturbances.
- The excitatory/inhibitory balance within the visual cortex is hypothesized to be altered in migraineurs.
Purpose of the Study:
- To investigate changes in after-image duration in migraineurs compared to healthy controls.
- To explore alterations in after-image duration throughout the migraine cycle.
Main Methods:
- Visual after-image duration was measured in episodic migraineurs (EMs), chronic migraineurs (CMs), and healthy controls (HCs).
- Seven EMs underwent daily assessments over 20-32 days to track changes across the migraine cycle.
Main Results:
- Interictally, migraineurs showed shorter after-image durations compared to HCs.
- Significantly longer after-image durations were observed during the ictal phase compared to the interictal phase in EMs.
Conclusions:
- Migraineurs display an altered excitatory/inhibitory equilibrium in the visual cortex.
- This equilibrium appears to oscillate cyclically, correlating with the migraine phase.
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