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Somatosensory evoked potentials in migraine
M de Tommaso1, V Sciruicchio, P Tota
1II Dept. of Neurology, University of Bari, Italy.
Functional Neurology
|March 1, 1997
Summary
Migraine patients show abnormal somatosensory evoked potentials (SEPs), indicating potential neural dysfunction. These SEP abnormalities, particularly in the prerolandic component, suggest a possible chronic dopaminergic issue in migraine sufferers.
Area of Science:
- Neuroscience
- Neurology
- Clinical Electrophysiology
Background:
- Migraine is a common neurological disorder.
- Somatosensory evoked potentials (SEPs) are used to assess neural pathway function.
- Previous research suggests potential neurophysiological alterations in migraine.
Purpose of the Study:
- To investigate somatosensory evoked potentials (SEPs) in patients with migraine with aura and without aura.
- To identify specific SEP abnormalities associated with different migraine types.
- To explore the potential underlying mechanisms of these SEP alterations.
Main Methods:
- Twenty-six patients with migraine (with and without aura) were studied.
- Somatosensory evoked potentials (SEPs) were recorded during the intercritical phase.
- SEP parameters including amplitude and interhemispheric asymmetry were analyzed.
Main Results:
- Reduced mean amplitude of the prerolandic component in the right hemisphere for both migraine groups.
- Enhanced ratio between parietal N20/P25 and prerolandic P22/N30 in both hemispheres for migraineurs.
- Significant interside asymmetry of N30 amplitude observed in migraine with aura patients compared to controls.
Conclusions:
- SEP abnormalities are present in both migraine with aura and without aura.
- These findings suggest a primary neural disorder in migraine, potentially linked to chronic dopaminergic dysfunction.
- SEP alterations were not correlated with patient age, illness duration, or attack frequency.