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Relationship between precipitating agents and neurophysiological abnormalities in migraine
M Siniatchkin1, N Averkina, W D Gerber
1Paediatric Neurology, University of Kiel, Kiel, Germany. m.siniatchkin@pedneuro.uni-kiel.de
Cephalalgia : an International Journal of Headache
|March 25, 2006
Summary
Migraine anticipation mechanisms remain unclear. This study found stress and menstrual cycle phases alter contingent negative variation (CNV) amplitude, suggesting increased migraine likelihood, particularly premenstrually.
Area of Science:
- Neuroscience
- Psychophysiology
Background:
- Migraine pathophysiology and triggers are not fully understood.
- The contingent negative variation (CNV) reflects cognitive processing and anticipatory activity.
Purpose of the Study:
- To investigate the influence of the menstrual cycle and stress on CNV in migraine patients.
- To explore potential mechanisms of migraine anticipation.
Main Methods:
- Recorded CNV in 17 migraineurs and 15 controls during premenstrual and ovulation phases.
- Assessed CNV under rest and stress conditions.
- Analyzed initial CNV component amplitude changes.
Main Results:
- Migraineurs showed increased CNV amplitude premenstrually versus ovulation.
- Both groups exhibited increased CNV amplitude under stress.
- Stress-induced CNV increase was more pronounced in migraineurs during the premenstrual phase.
Conclusions:
- Stress and menstrual cycle phases significantly alter initial CNV amplitude.
- These CNV changes may indicate heightened migraine susceptibility.
- Findings suggest a link between hormonal fluctuations, stress, and migraine predisposition.