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Event-related slow potentials and associated catecholamine function in migraine.

S Nagel-Leiby1, K M Welch, G D'Andrea

  • 1Department of Neurology, Henry Ford Hospital, Detroit, MI 48202.

Cephalalgia : an International Journal of Headache
|December 1, 1990
PubMed
Summary

Migraine patients show distinct neurochemical and electrical activity changes. Migraine without aura involves dopamine and norepinephrine imbalances, while migraine with aura affects cortical potentials.

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Area of Science:

  • Neuroscience
  • Neurology
  • Biochemistry

Background:

  • Migraine is a complex neurological disorder.
  • Understanding the neurochemical and electrophysiological underpinnings of migraine subtypes is crucial.

Purpose of the Study:

  • To investigate differences in plasma catecholamines (norepinephrine and dopamine) and event-related slow potentials between migraine patients (with and without aura) and healthy controls.
  • To explore potential cyclical variations in these parameters related to the menstrual cycle (menses and ovulation).

Main Methods:

  • Measurement of plasma norepinephrine and dopamine levels.
  • Recording of event-related slow potentials over the posterior cortex.
  • Comparison across migraine with aura, migraine without aura, and normal subjects at menses and ovulation.

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Main Results:

  • At menses, migraineurs exhibited elevated plasma dopamine and decreased norepinephrine compared to controls, with a greater imbalance in migraine without aura.
  • At ovulation, altered posterior cortical event-related slow potentials were observed: reduced early epoch negativity in migraine with aura and reduced late epoch negativity in migraine without aura.
  • These findings suggest distinct pathophysiological mechanisms for migraine with and without aura, potentially linked to catecholamine systems and cortical activity.

Conclusions:

  • Migraine without aura may involve dynamic alterations in both norepinephrine and dopamine neuronal function.
  • Migraine with aura's pathophysiology appears less reliant on catecholamine imbalance, with norepinephrine being the primary affected catecholamine.
  • The observed mechanisms are likely localized to posterior cortical regions but may be influenced by brainstem modulation.